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One of two new Sydney red gums. The shade from these two trees, once they have grown, is expected to cover “at least three-quarters of the car park.”  

This area is permeable paving, yet people can walk on it without experiencing problems or noticing a difference.

I was impressed when I read that the Inner West Council had planted two advanced size Sydney Red Gums (Angophora costata) at the Garners Avenue car park in Marrickville as part of an upgrade.

Council Administrator Mr Pearson said in Council’s Press Release, “When mature, these trees will provide canopy cover to at least three-quarters of the carpark.  So, instead of the usual unshaded bitumen and concrete which would increase the inner west’s ‘urban heat island effect,’ we are actually contributing shade, cooler ambient air temperatures, and improved urban air quality.”  

Council’s Press Release makes mention that shade not only increases amenity, but also increases “the serviceable life of the bitumen by up to 30%.”   

The trees were planted in structural vaults, which on the surface look like business as usual, but are actually purpose built to provide optimum living conditions for a tree planted in unnatural conditions.

The surface is covered by permeable paving allowing rainwater to get to the tree.  Below ground, the area for the tree to grow has been prepared by placing good-quality soil in structural cells across a large area.  The structural cells provide room for the roots to grow, but also encourages them to grow in preferred directions.

Better soil, access to water & room to spread allows the tree grow to maturity.   This technique is light years better than digging a hole in the pavement & planting a tree.  It is well worth the money Council needs to spend on this planting style.

Council’s Press Release (http://bit.ly/2qwAt49 ) made many favourable statements regarding public trees.  It appears we can expect to see a positive change in our urban forest.

“Trees usually come second to infrastructure such as footpaths, roads and car parks. But Inner West Council is determined to turn this thinking around.”

I visited the Garners Street carpark & saw the two Sydney red gums.  They look great.  The flowers from these trees will provide food for bees, butterflies & nectar-eating birds.

I was also impressed to see three new Banksias planted in a small garden area toward the back of the car park.

Two other good sized Diamond leaf pittosporum (Auranticarpa rhombifolia) growing on the other side are festooned with orange berries at present.  These are Australian native rainforest trees & their orange berries attract fruit-eating birds.

The addition of Australian native trees that can grow to a significant size is a big & positive change from the current Purple Leaf Ornamental Plum (Prunus nigra) & Evergreen ash (Fraxinus griffithii) planted at the front of the car park.

I like what Inner West Council have done here.  Give the trees a few years to grow & the difference will be noticeable.  The more Council can plant decent sized native trees in areas traditionally covered with concrete & bitumen the better.  Changes like this will have positive impacts on the livability of our area.   I thank Council for doing this work.

New planting of three Banksias and other plants.

Diamond Leaf pittosporums looking great with all those orange berries.

Garners Street car park Marrickville as it looks from the street.

 

Ausgrid pruning of street trees in Fotheringham Street Enmore last week.   Photo by Catherine Bakker‎ and used with thanks.

Ausgrid pruning of street trees in Fotheringham Street Enmore last week. Photo by Catherine Bakker‎ and used with thanks.

More Ausgrid pruning of street trees in Fotheringham Street Enmore last week.  Photo by Catherine Bakker‎ and used with thanks.

More Ausgrid pruning of street trees in Fotheringham Street Enmore last week. Photo by Catherine Bakker‎ and used with thanks.

The Inner West Council said in a press release dated 18th January 2017 that they are negotiating with power company Ausgrid to pay the costs of removing trees damaged by Ausgrid’s pruning & the planting of replacement trees.

The press release says  –

  • Council are “targeting the replanting of trees damaged by tree trimming in many inner west streets.”
  • “Council officers have been working with Ausgrid officers to nominate selected trees that should be replaced.”
  • “Ausgrid has agreed to assess and mostly likely approve the removal of these trees.”

While I am glad that Council are negotiating to have Ausgrid pay for the removal & replacement of the trees they have decimated by their pruning, I have some trepidation wondering just how many of our street trees will need to be removed.   If you look at the state of the street trees around the former Marrickville municipality, you will see that the numbers will not be insignificant.

Ausgrid have created an unnecessary loss of the urban forest & one which will have an negative impact on the community in terms of heat, pollution, stormwater management & the mental/physical health of the community, not to mention the cost to wildlife who possibly lose their homes & food source.

There has been a lot of research published recently that found that street trees provide numerous benefits to human health.  The lack of a good urban forest causes problems such as increased obesity, more respiratory & heart disease, more fatal heart attacks & the latest, more incidence of dementia.  Also, a poor urban forest is known to increase unhappiness & depression in the community & poorer learning in children.

Therefore, it is not a small impact to the community by Ausgrid when they pruned our street trees to such a degree that council thinks the trees will never recover & need to be removed.  It takes years for trees to grow to a point where they are providing viable benefits to the community, so all the health problems listed above are another impact caused by Ausgrid.

There are other tree losses that are not covered by this negotiation with Ausgrid by Council.  Just in my block one mature tree in a front garden was removed because Ausgrid removed one whole side of the tree leaving an unsightly half a tree behind. It is not only street trees that have been negatively impacted.

I applaud the Inner West Council for pursuing this action with Ausgrid.
Council is also looking at an aerial bundle cabling program, which is wonderful.  Take a look at the streets in the Botany area to see what the difference can mean to street trees.  Ausgrid will not need to prune so harshly if there is aerial bundle cabling installed.  It is a much better option than ordinary powerlines, though not as good as installing powerlines underground.  The last option is more expensive, but should be a condition for all new developments in my opinion.

Council in lobbying Ausgrid to develop an Inner West Guideline for tree pruning “sympathetic to our urban metropolitan environment – an area that is not fire prone.”

This is also a great move by Council.
Further in the press release – “The recent discussions with Ausgrid comes after Council late last year received a commitment from Ausgrid that their tree trimming contractors will continue to reduce the cutback they carry out on local street trees to achieve a safe clearance from power lines.  New contractors are now being directed to cut a reduced clearance of just 1 metre from low voltage wires, plus up to 0.5 metre for regrowth for a maximum of 1.5 metres in total resulting in a much improved result for local street trees than previous more radical pruning.”

Then why are Ausgrid, just in the last week, pruning way below the telecommunications cable?  The photos I posted in this post of trees in Fotherington Street Enmore & Renwick Street Marrickville are January 2017 examples of the new improved pruning from Ausgrid.  Sorry, but this was not the norm when Energy Australia did the street tree pruning.

The street trees in Renwick Street Marrickville were pruned last week.

The street trees in Renwick Street Marrickville were pruned by Ausgrid last week.  This is not “trimming.”

More examples of street tree pruning by Ausgrid in street trees in Renwick Street Marrickville

More examples of street tree pruning by Ausgrid in street trees in Renwick Street Marrickville.  

This poor tree has been vandalised at least three times since the tree was planted in 2015.   Council did put up a small sign saying that it had been vandalised, but this was not a deterrent.

This poor tree has been vandalised at least three times since the tree was planted in 2015. Council did put up a small sign saying that it had been vandalised, but this was not a deterrent.

The Inner West Council planted a street tree in a pocket of grass in Myrtle Street Marrickville.  A tree was much needed at this location because it is bare & dare I say ugly.

I was very happy they planted at this location.  Then the tree had several branches snapped off.   The tree grew more branches & the tree was vandalised again.  I started to doubt that this was a random act.

The tree’s desire to live was strong, so it grew some more & started to look strong & lush.

I went by the tree today & its leaves are dry & crisp.  Its thin branches are still alive showing that whatever was done to this poor tree happened recently.

Unfortunately, this tree is dying.  To me it appears that some sort of chemical was fed to it to make sure this determined tree would not rise up again.

It is beyond my comprehension why people rob the community & the wildlife of street trees.   One tree may not matter much, but we have an urban forest classified as ‘poor’ in terms of percentage of canopy cover.  We need trees just to break even in terms of the norm in Sydney.  We also need trees for good public health & we desperately need trees in terms of climate change.

We need more trees in Marrickville & throughout the old Marrickville municipality.  We need bigger, more shade-producing trees.

2016 was the third year in a row of record-breaking heat.  “The average global temperature last year [2016] reached about 1.1°C above the pre-industrial era, which has brought us extremely close to the 1.5°C target established at the historical December 2015 Paris climate summit.”

1.1°C may not seem much, but you only have to have been in Sydney this past month to experience what a heatwave feels like.  Heatwaves & extreme weather events are all part of this global rise in temperature.  The Arctic is the warmest on record, sea ice is melting at alarming speed, coral reefs are bleaching, the oceans are heating up….  There is more, but you get the picture.

Now here is where is gets really interesting.   “Australia is especially at risk as we are 8°C hotter than the world average” http://bit.ly/2kfCKAD

We cannot keep relying on air-conditioning.  One day there will be too many of us using too much power for the system to cope with & we won’t be able to turn on the air-con.  Then people will die.  Perhaps thousands of people.  Death in numbers like this has happened many times before.

We won’t be able to easily acclimatise to the heat either.   The following is part of a summary of research titled, ‘Limitations to Thermoregulation and Acclimatization Challenge Human Adaptation to Global Warming’ published in 2015.   They knew then that it will be difficult for the human race to adapt.   Thousands of us are likely to die in each heatwave event.  That will be a devastating experience for many.

Human thermoregulation and acclimatization are core components of the human coping mechanism for withstanding variations in environmental heat exposure. Amidst growing recognition that curtailing global warming to less than two degrees is becoming increasing improbable, human survival will require increasing reliance on these mechanisms. The projected several fold increase in extreme heat events suggests we need to recalibrate health protection policies and ratchet up adaptation efforts.”   You can read the whole paper here for free – http://www.mdpi.com/1660-4601/12/7/8034

I hope the Inner West Council plant another tree at this location.   Tree vandals cannot be the deciders on how the rest of the community live, their health, the level of pollution they live with, their ability to have a beautiful suburb, how cool their streets are or whether the wildlife can have habitat & food.  The culture must change.  The streets belong to all.

As I post this I am listening to the weather forecast on the TV news.  They are forecasting a heatwave two days from now on Tuesday.   That will be the third heatwave for Sydney in 2017 & it is only January.

Wonderful that Marrickville council planted  Queensland Brushbox trees along the Princes Highway Tempe.  Once grown they should help all the residents living close to the highway.

Wonderful that Marrickville council planted Queensland Brushbox trees along the Princes Highway Tempe. Once grown they should help the workers in the shops and all the residents living close to the highway.

Researchers from the Woolcock Institute of Medical Research at the University of Sydney have released their review into the health impact of tiny air pollution particles, also known as particulate matter.  They found that most particulate matter is man-made & “could lead to increase in people reporting to hospitals with respiratory or cardiovascular effects.”

This supports 2010 research done by the US Health Effects Institute who reviewed 700 worldwide health-pollution studies. They found:

  • traffic pollution within a 500-metre radius of a major thoroughfare is likely to exacerbate asthma in children.
  • trigger new asthma cases across all ages
  • impair lung function in adults &
  • could cause cardiovascular illness & death. See – http://bit.ly/1MKStR8

The researchers from the Woolcock Institute of Medical Research recommended that immediate steps be taken to reduce particulate matter pollution from the air.  Although particulate matter can come from plant & animal matter, the majority comes from motor vehicles, mining, power stations & even coal fire barbeques & wood heaters.

“On high pollution days we may detect extra cases of stroke, other myocardial infarctions, heart attacks, for instance, and also PM (particulate matter) air pollution has been linked to premature mortality…..  So it will bring forward those few extra deaths – particularly, we think, in more vulnerable people such as the elderly.”  See http://ab.co/1RP6teY

However, this study from the Lancaster Environment Centre has shown that –

  • “increasing deposition by the planting of vegetation in street canyons can reduce street-level concentrations in those canyons by as much as 40% for nitrogen dioxide & 60% for particulate matter.
  • Deposition rates of nitrogen dioxide & particulate matter to vegetation are much higher than those to hard, built surfaces.
  • Substantial street-level air quality improvements can be gained through action at the scale of a single street canyon or across city-sized areas of canyons.
  • Vegetation will continue to offer benefits in the reduction of pollution even if the traffic source is removed from city centers.” See – http://bit.ly/1UMfVQV

And, “The efficacy of roadside trees for mitigation of PM [particulate matter] health hazard might be seriously underestimated in some current atmospheric models.”

The ability to lower particulate matter is in the power of human beings.  Stop using coal power stations, drive less, ride bicycles & catch public transport more & don’t use coal-fired barbeques or burn wood for heating.

We can plant a tree on our property if there is space & create a verge garden on the street.  We can also lobby our local councils to increase the urban forest, as the Lancaster research clearly demonstrated a drop of 60% for particulate matter between the street & the row of terrace houses & these were only small Birch trees in pots.  Imagine what a good canopy mature street tree can do for us all in cleaning up the air.

Researchers continue to clearly show us that trees are good for people in a myriad of ways.  Our mental health & happiness levels, our ability to learn & our respiratory & cardiac health are just some benefits trees bring.

A street in Marrickville.  No overhead powerlines and footpaths of equal size on both sides of the road.

A street in Marrickville. No overhead powerlines and footpaths of equal size on both sides of the road.  For the benefit of all, there should be street trees along here.  

 

Dead Sydney Blue gum in Tooth Lane Camperdown

Dead Sydney Blue gum in Tooth Lane Camperdown.

Marrickville Council has given notice of their intention to remove a Sydney Blue Gum (Eucalyptus saligna) in Tooth Lane Camperdown.

Council gives the following reasons for removal –

  • “The tree has died (scenecent) [sic]
  • The tree poses an unacceptable level of risk to the public and property.”

I visited this tree & it is as Council says – dead. What is incredible is that this tree had been allowed to live in the first place. Either it was left in-situ when the units were being developed or it was planted shortly afterwards. It is the only tree in this lane. It once had a significant canopy that I can only assume was enjoyed by the people who looked onto its canopy & enjoyed the shade it provided. This tree provided significant amenity for many years.

Council says they will not be planting a replacement tree “due to site restraints.”

I agree with Council that planting another tree here is unfeasible because there simply is no room.   However, with Marrickville municipality officially recognised as having one of the poorest canopies in Sydney, I would consider it a good move toward increasing our urban forest if Council planted a Sydney Blue Gum in another location where its growth will not be restrained. There are plenty of suitable places.

It seems counterproductive in these days of climate change not to use every opportunity to replace any tree lost with at least one other of comparable size & amenity. In many places the standard is to replace one lost with two to four new trees.  To lose a tree, & a big tree at that, & decide to replace with nothing is disappointing. It makes me wonder how Marrickville’s urban forest will ever achieve the 20% increase as campaigned for by the 202020 Vision.

Sydney Blue gums are valuable trees to local wildlife providing habitat & food. They also are one of the few tall tree species in the municipality, so provide green on the skyline for the community to see.  The benefits of trees have been repeatedly spoken about in this blog.  Just being able to see trees on the skyline instead of red tiled roofs offers some respite from the harshness of the inner city landscape.

I offer Broadway, Ultimo & Chippendale as nearby suburbs that have 3-4 storey street trees as a norm. Marrickville municipality has, on average, wider streetscapes & verges than those suburbs, yet our streetscapes are remarkably different.

The deadline for submissions is Friday 12th February 2016.

A very detirmined tree to live in this space for as long as it did.  When it is gone the space is perfect for a small garden to keep some beauty in this lane.  Better than weeds.

A very detirmined tree to live in this space for as long as it did. 

Marrickville streetscape.  There was more concrete behind me.

Marrickville streetscape – photo taken last week. There was more concrete behind me.

The news has been very tree-orientated in the last few days with Greg Hunt the Federal Environment Minister announcing that the government will have a vision for improved urban tree coverage within 18-months. See – http://bit.ly/1KvzEuO

The federal government’s plan for cities is to increase the urban canopy every decade to 2050 to “reduce heat within city environments and improve health outcomes.”

“Green cities — cities with high levels of trees, foliage and green spaces — provide enormous benefits to their residents. Increasing urban canopy coverage decreases heat, which improves health and quality of life.”

Finally the urban canopy is being acknowledged as a health issue!  Recent research has found an increase in respiratory & cardiac illness with more fatal cardiac arrests in areas with a poor canopy. Add increased depression & obesity & you have an unhealthy, unhappy community, which ultimately has a cost on all of the community.

Unless there is a change of culture, I believe these problems will only increase with the current trend of high-rise housing with little or no green space or access to peaceful green space, as many of our parks are being transformed into entertainment areas.  Therefore, an Australia-wide initiative driven by the federal government to increase the urban forest canopy can only be applauded. We can have high-rise & green space. Green walls & green roofs can be incorporated into new designs just as easily as a pool for example.

The federal government’s announcement might be alarming for those state governments which are removing trees at a fierce rate in the push for development.  In Sydney alone 400 trees, many of them large Fig trees that are iconic to Sydney are being removed in Randwick for the eastern suburbs light rail project. This is despite Randwick Council saying that the light rail line can travel the same route without removing the trees. A whopping 760 trees will be removed along the entire light rail route.

The NSW government’s response to criticism about the tree loss has been that eight new trees will be planted for every tree removed. Sounds good, but I will watch with interest at what species of tree is planted, how many survive & what the canopy looks like in a decade. I highly doubt the canopy will ever look like it did in the beginning of December 2015.

Even closer to Marrickville LGA is Sydney Park at St Peters where 350 trees are being removed to establish a construction depot for the WestConnex Motorway.  See – http://bit.ly/1OpHg63.  It seems that trees & green spaces are fair game for development, even when there are other options. Bushland at Wolli Creek is also threatened for WestConnex. The most expedient & cheapest way is to remove trees, yet the impact of doing so has far reaching consequences on both the community & the wildlife.

Then there is the 10/50 Code that allows for any tree to be removed within 10-metres of a home & remove underlying vegetation within 50-metres of a home without seeking approval because of bushfire risk. The North Shore & Pittwater areas of Sydney have been losing trees like they have no meaning.  The 10/50 Code offers a giant loophole for landowners to remove trees for any reason they like & according to Lane Cove Council, bushfire risk in the area is minimal. Still their urban forest has been decimated.

Globally 2015 was the hottest year since records started. 2011 to 2015 have been the hottest 5-year period world-wide since records started.  Sydney is expected to be like living in Rockhampton in subtropical Queensland by the turn of the century. See – http://bit.ly/1DM40tk Therefore, what is planted also needs to be taken into consideration if local councils want the trees to survive more than a few years.

Part of greening our cities, which also includes suburbs, requires a culture-shift of the community itself. Many areas of Sydney are defined by their trees – the North Shore, Pittwater, Eastwood area & Sutherland Shire as examples. Then there are suburbs with few trees, both public & private.

I took this photo in Bexley today.  This was one of a number of other street trees pruned like this.

I took this photo today in Bexley. This street tree has negligible amenity, except for the person who pruned it.  It adds no benefit to the wider community or to managing climate change

I think it may be a battle for a while until the prevailing attitude towards trees changes. To change public perception of trees, the government will need to embark on a strong multi-media education program. Twice in the past week I passed individuals in Marrickville who were casually pruning street trees into small stumps with no canopy.   That they do this in broad daylight shows that they believe that it is their right to do so & that they have little care or no conception that the street tree belongs to the whole community.

With luck, tree vandalism will become a rare occurrence, street trees will be planted in better conditions & the community will embrace the care of the tree by watering it while it is establishing & also during dry periods.

What will be wonderful in my opinion is that large canopy trees will become the norm because it is these trees that provide the most benefit & utility in cooling the streets & also in carbon sequestration.  It is also these types of trees that the federal government is talking about. I will be very pleased to see spindly street trees only used in spaces where there is no room for anything larger.

I will also enjoy the resultant beauty along our streetscapes when trees become more of a feature than buildings & where landscaping is used more often than concrete. Green walls & green roofs will be wonderful as well.

Lastly, greening our suburbs will bring wildlife in & support wildlife already here. Instead of the constant noise of traffic & planes, we will listen to white noise of bird song during the day & crickets & frogs at dusk. I know this to be true because the simple addition of some native trees & an under-storey has brought much wildlife to out place, whereas it was almost bereft when we moved in.

We have to change as individuals & as communities. Local Councils need to change as well. Much needs to be tossed out of current tree policies if they do not support increasing the canopy or the tree species chosen & placement does little to lower the urban heat island effect.  I suspect local councils will rapidly get on board with federal government directives, but I fear some in the community may find it hard to embrace an environment full of trees. We all have much to gain from a greener environment, from large canopy trees, to areas of under-storey filled with shrubs & plants & grasses & from being able to walk around without dashing from patch of shade to patch of shade.

Climate change will demand that everyone cooperates with the greening of our cities or we will suffer, cause our community to suffer & make it unlivable for future generations.

 

The sign by Marrickville Council. I am very pleased that Council is doing this.

The sign by Marrickville Council. I am very pleased that Council is doing this.

I am feeling proud of Marrickville Council. Today I drove up Salisbury Road, well-known locally as a lovely leafy street, even though it is a main thoroughfare. This is one of the few streets that has elm trees and sections where the canopy reaches across the road.

Quite a few of the street trees on the northern side of Salisbury Road have been pruned by power company Ausgrid and left a shadow of their former selves. The pruning is quite vicious with many of the trees losing a whole side.

My initial response was despair as I looked at the poor trees thinking yet another street of great trees has been lost. Then I saw a large vinyl sign tied up high on one of the more butchered trees.

The sign says – “THIS TREE HAS BEEN PRUNED BY Ausgrid. Contact Ausgrid on 13 13 65 to express your concerns. Marrickville Council wants to prevent this type of destructive pruning.”

(Sorry, no photos at this time as our computer is in for repairs. I will add photos once I get it back.)

I was extremely happy to see Marrickville Council making such a visible and clear response to Augrid’s pruning standards.

Although Ausgrid says their “tree trimming” conforms to standards, one need only drive, walk or cycle around the streets of Marrickville municipality to see that the tree pruning is radically different than it was when Energy Australia was the power company that pruned the street trees. Yes there would be the occasional butchered tree, but it was certainly not the norm, as it is now with Ausgrid at the helm.

Street trees that have been there since the 1940s have lost their shape due to recent pruning, where they lived happily with power lines and a cycle of 7-8 year pruning. Even when pruning was done, the trees were left viable and for the most part, with their beauty intact.

We did not have electrical fires and streets or suburbs burning down. Nothing happened. The community had street trees and electrical power. It is my experience of the past that convinces me that Ausgrid’s tree pruning standards are beyond what is needed. That Marrickville Council agrees with me also confirms my opinion.

I do not think is okay for Ausgrid to decimate the street trees leaving many unviable. This approach to street tree pruning not only has a negative effect on the trees themselves. Ausgrid pruned during spring when many of the trees were in flower. Consequently they removed a large amount of food that wildlife was dependent on. Spring is also nesting season and is the one time when trees should be left alone. It is even more important to consider wildlife when we now know that bird numbers are declining in urban areas.

The other impact is on the well being of the community. Recent research is quite clear that green leafy streets have a positive impact on human health. Trees clean the air from pollutants. If you only have half a tree remaining, it can do only half the job it was doing. Therefore air pollution rises and according to researchers, so does respiratory and heart disease, with more fatal heart attacks.

Then there is the psychological impact of less green and ugly trees. Again, it is well-known that a green leafy streetscape results in significantly less depressive illnesses within the community. Less obesity too, as people are more inclined to leave their house and ditch their car if they have pleasant streets to walk. The flow on effects of a poor canopy on public health is costly and accumulative.

Then there is the issue of climate change with COP21 recently finishing in Paris. Trees are a vital component in managing. climate change. The urban forest has a major role sequestering carbon dioxide and cooling the streets. Marrickville Council is trying to lower the urban heat island effect in Dulwich Hill, but how can they make any meaningful and lasting impact if Ausgrid comes and removes half or more of the street trees.

All power companies need to play a big part in managing climate change. Their aim may be to have no trees on the side of the street with power lines, but if this happens our suburbs will become much hotter. With heat comes heat-related deaths, sometimes in the thousands.

What Ausgrid presents as a simple community service to keep us all safe from fire, has multiple impacts and all of them negative. I cannot understand why the previous power company Energy Australia, who managed electricity and street trees for many decades, were able to prune street trees without decimating them and causing local councils to be outraged at the loss of community amenity. As far as I can tell, nothing changed except the attitude and practices of the new power company Ausgrid.

Marrickville Council hung this large sign high up in a street tree on Salisbury Road Camperdown. My photo does not show that a whole side of the tree has been removed.

Marrickville Council hung this large sign high up in a street tree on Salisbury Road Camperdown. My photo does not show that a whole side of the tree has been removed.

Stanmore Sydney.  Trees can define an area and act as landmarks.  I remember when this palm was planted. It was the early 80s and a number of  people I worked with actually went have a look because it was so unusual for trees to be planted in roundabouts.

I don’t have a photo of London, so here is one in Stanmore Sydney. Trees can define an area and act as landmarks. I remember when this palm was planted. It was the early 80s and a number of people I worked with actually went have a look because it was so unusual for trees to be planted in roundabouts.

London England has 8-million trees & these just been calculated to have a value of £6.1 billion.  Yes, billion with a B.  The trees also contribute a further £130 million in wider benefits.

The value of the trees was calculated by an iTree urban forest survey. See – http://bit.ly/1YpoWy8

“Trees play a huge role in improving air quality and remove 299 tonnes of PM10 and 698 tonnes of NO2 pollution across London annually.”

“Key services London’s trees provide include:

  • storm water alleviation = 3,414,000m3 per annum worth £2.8 Million
  • carbon storage = 2,367,000t per annum worth £146.9 Million
  • pollution removal = 2241t per annum worth £126.1 Million
  • It would cost £6.1bn to replace all of London’s tree canopy.”

A new partnership with Unilever & the City of London will mean a further 40,000 new trees planted. 20,000 of these new trees will be offered to London’s schools & 20,000 trees will create a new urban woodland in West London, which the community will help plant.

“The Mayor has already supported the planting of nearly half a million trees in London including 20,000 street trees along some of the busiest roads.”

London definitely gets just how important trees are to helping mitigate climate change, carbon sequestration, lowering air pollution, managing storm water, adding beauty to the streetscapes, as well as improving livability & public health.  Imagine how beautiful another 40,000 trees will look.

A truly amazing sign placed on a tree by Shoalhaven City Council.  The tree is in Sanctuary Point, which is located about 25-km south of Nowra & around 200-km south of Sydney.   Photo  by Gavin Swan & I thank him for sharing it with me.

A truly amazing sign placed on a tree by Shoalhaven City Council. The tree is in Sanctuary Point, located about 25-km south of Nowra & around 200-km south of Sydney. Photo taken by Gavin Swan & I thank him for sharing it with me.

“The spread of the built environment results on conflicts between the death of such trees and public safety. The importance of old growth remnants for native fauna habitat was recognised in the decision to retain the main parts of this tree and the numerous hollows it contains. It has also been retained to show the scale of coastal forests that once covered the area. SCC”Shoalhaven City Council.

How progressive is this!  I think this is a fabulous way to educate the community on the value of trees, especially old growth trees.  Hollows are incredibly important & they are being lost at an alarming rate.

It takes between 100-150 years before trees start creating hollows.  Eucalypts start creating hollows after dropping branches & we know that once branch-dropping starts, the tree is removed for the safety of the human population

“Australia-wide, 15% of all land birds use hollows. These 114 species include parrots, owls cockatoos & lorikeets, ducks, treecreepers, owls, owlet-nightjar, kingfishers, pardolotes, martins & woodswallows.”  ~ Sourced from Wildlife Notes, Department of Conservation & Management April 2005.

One of the least known characteristics of Australian animals is their high utilisation of tree hollows. For example, the proportion of Australian animals that use tree hollows is three times greater than in North America & twice as great as in South Africa.

About 350 Australian animals use hollows for either roosting or nesting. This includes:


  • half of our small bats, 
  • nearly 90% of our parrots, 
  • all of our gliders, 
  • all but one of our owls 
  • all of our tree-creepers. 

Nearly 20% of our birds use hollows in some way. For 60% of these, hollows are essential.” http://www.ozbox.net.au/anim&holl.htm

Of the 22 species of bats that have been recorded to utilise tree hollows in NSW, 10 of these are listed as threatened. (Gibbons & Lindenmayer 1997).

I am very impressed by this action by Shoalhaven City Council & hope that it becomes commonplace across Australia.

Lots of trees has transformed this park into a pleasant green space for locals.

Camperdown Memorial Rest Park.  Lots of trees has transformed this park into a pleasant green space for locals.

We were surprised to discover the City of Sydney’s plan to increase current canopy cover by 50 per cent could have a bigger impact on reducing air pollution than a reduction in traffic.” ~ Peter Irga lead researcher of a University of Technology Sydney study that shows the pollution reduction benefits of trees.

Today, ‘The Economic Framework for Green Infrastructure,’ was released.  The Framework is a joint effort by City of Melbourne, City of Banyule, City of Kingston, City of Moonee Valley & Victoria University in partnership with the Victorian Government.  The document will help local councils put a dollar value on their urban greening activities.

“The Framework identifies the key steps needed to value “green infrastructure”, and outlines a full life cycle management process to assist decision making. It also provides explanations around various approaches used to value green infrastructure.”

The evidence is becoming overwhelming. Trees, canopy cover & green space is vital for the health of the community. Without these things in sufficient amounts, people suffer from negative health effects such as depression. obesity, heart disease, respiratory disease & according to the University of Technology researchers, several types of cancer. Local councils need to increase their budget to allow for green infrastructure to be increased, maintained & built upon to increase livability, health & happiness.

To read more see – http://bit.ly/1SL08xj

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