{"id":13169,"date":"2024-12-05T10:00:00","date_gmt":"2024-12-05T10:00:00","guid":{"rendered":"https:\/\/modernsciences.org\/staging\/4414\/?p=13169"},"modified":"2024-11-20T07:51:17","modified_gmt":"2024-11-20T07:51:17","slug":"urban-forests-global-cities-canopy-test-singapore-december-2024","status":"publish","type":"post","link":"https:\/\/modernsciences.org\/staging\/4414\/urban-forests-global-cities-canopy-test-singapore-december-2024\/","title":{"rendered":"We rated the urban forests of 8 global cities \u2013 only Singapore passed the 30% canopy test"},"content":{"rendered":"\n<div class=\"theconversation-article-body\">\n    <figure>\n      <img  decoding=\"async\"  src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABAQMAAAAl21bKAAAAA1BMVEUAAP+KeNJXAAAAAXRSTlMAQObYZgAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAApJREFUCNdjYAAAAAIAAeIhvDMAAAAASUVORK5CYII=\"  class=\" pk-lazyload\"  data-pk-sizes=\"auto\"  data-pk-src=\"https:\/\/images.theconversation.com\/files\/632803\/original\/file-20241118-17-cquu26.jpg?ixlib=rb-4.1.0&#038;rect=8%2C4%2C2986%2C1989&#038;q=45&#038;auto=format&#038;w=754&#038;fit=clip\" >\n        <figcaption>\n          \n          <span class=\"attribution\"><a class=\"source\" href=\"https:\/\/www.shutterstock.com\/image-photo\/tree-lined-residential-street-historic-west-674711881\" target=\"_blank\" rel=\"noopener\">Ryan DeBerardinis, Shutterstock<\/a><\/span>\n        <\/figcaption>\n    <\/figure>\n\n  <span><a href=\"https:\/\/theconversation.com\/profiles\/thami-croeser-729067\" target=\"_blank\" rel=\"noopener\">Thami Croeser<\/a>, <em><a href=\"https:\/\/theconversation.com\/institutions\/rmit-university-1063\" target=\"_blank\" rel=\"noopener\">RMIT University<\/a><\/em><\/span>\n\n  <p>Can you see three trees from your home, school or workplace? Is there tree canopy cover shading at least 30% of the surrounding neighbourhood? Can you find a park within 300 metres of the building? <\/p>\n\n<p>These three simple questions form the basis of the \u201c<a href=\"https:\/\/link.springer.com\/article\/10.1007\/s11676-022-01523-z\" target=\"_blank\" rel=\"noopener\">3+30+300 rule<\/a>\u201d for greener, healthier, more heat tolerant cities. This simple measure, originally devised in Europe and now gaining traction around the world, sets the minimum standard required to experience the health benefits of nature in cities.<\/p>\n\n<p>We <a href=\"https:\/\/www.nature.com\/articles\/s41467-024-53402-2\" target=\"_blank\" rel=\"noopener\">put the rule to the test<\/a> in eight global cities: Melbourne, Sydney, New York, Denver, Seattle, Buenos Aires, Amsterdam and Singapore. <\/p>\n\n<p>Most buildings in these cities failed to meet the 3+30+300 rule. We found canopy cover in desperately short supply, even in some of the most affluent, iconic cities on the planet. Better canopy cover is urgently needed to cool our cities in the face of climate change. <\/p>\n\n<iframe loading=\"lazy\" src=\"https:\/\/rmituniversity.maps.arcgis.com\/apps\/instant\/portfolio\/index.html?appid=7bbb6fa639d34eb38d2ff6fb035feffd\" width=\"100%\" height=\"800\" frameborder=\"0\" style=\"border:0\" allowfullscreen=\"\">iFrames are not supported on this page.<\/iframe>\n\n<h3 id=\"explore-all-three-interactive-maps-zoom-in-or-out-and-search-by-address-or-place-hit-the-i-button-for-more-detail-source-cobra-groeninzicht\">Explore all three interactive maps, zoom in or out and search by address or place, hit the \u201ci\u201d button for more detail. Source: <a href=\"https:\/\/www.cobra-groeninzicht.nl\/\" target=\"_blank\" rel=\"noopener\">Cobra Groeninzicht<\/a><\/h3>\n\n<h2 id=\"shady-trees-are-good-for-health-and-wellbeing\">Shady trees are good for health and wellbeing<\/h2>\n\n<p>People are more likely to suffer from <a href=\"https:\/\/www.nature.com\/articles\/d41586-024-00968-y\" target=\"_blank\" rel=\"noopener\">depression<\/a>, <a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC6661720\/\" target=\"_blank\" rel=\"noopener\">anxiety<\/a>, <a href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S1353829216301332\" target=\"_blank\" rel=\"noopener\">obesity<\/a> and <a href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S1618866723003631\" target=\"_blank\" rel=\"noopener\">heatstroke<\/a> in places with fewer trees, or limited access to parks. But how much \u201cgreen infrastructure\u201d do we need to stay healthy and happy?  <\/p>\n\n<p>Dutch urban forestry expert Professor <a href=\"https:\/\/nbsi.eu\/coworker\/cecil-konijnendijk\/\" target=\"_blank\" rel=\"noopener\">Cecil Konijnendijk<\/a> set the standard when he introduced the 3+30+300 rule in 2022. This benchmark is based on his <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/36042873\/\" target=\"_blank\" rel=\"noopener\">wide-ranging review of the evidence<\/a> linking urban nature to human health and wellbeing. <\/p>\n\n<p>While the rule is still relatively new to Australia, it is gaining momentum internationally. Cities in Europe, the United States and Canada <a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0048969723063660\" target=\"_blank\" rel=\"noopener\">are using the measure<\/a>, formally or informally, in their urban forestry strategies and plans. These cities include Haarlem in the Netherlands, Malm\u00f6 in Sweden, Saanich in Canada, and Z\u00fcrich in Switzerland.  <\/p>\n\n<figure class=\"align-center \">\n            <img  decoding=\"async\"  alt=\"A tree-lined street in a built-up area with multi-storey buildings with complete 100% canopy cover\"  src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABAQMAAAAl21bKAAAAA1BMVEUAAP+KeNJXAAAAAXRSTlMAQObYZgAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAApJREFUCNdjYAAAAAIAAeIhvDMAAAAASUVORK5CYII=\"  class=\" pk-lazyload\"  data-pk-sizes=\"auto\"  data-ls-sizes=\"(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px\"  data-pk-src=\"https:\/\/images.theconversation.com\/files\/632453\/original\/file-20241117-17-rkyse4.JPG?ixlib=rb-4.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;fit=clip\"  data-pk-srcset=\"https:\/\/images.theconversation.com\/files\/632453\/original\/file-20241117-17-rkyse4.JPG?ixlib=rb-4.1.0&amp;q=45&amp;auto=format&amp;w=600&amp;h=400&amp;fit=crop&amp;dpr=1 600w, https:\/\/images.theconversation.com\/files\/632453\/original\/file-20241117-17-rkyse4.JPG?ixlib=rb-4.1.0&amp;q=30&amp;auto=format&amp;w=600&amp;h=400&amp;fit=crop&amp;dpr=2 1200w, https:\/\/images.theconversation.com\/files\/632453\/original\/file-20241117-17-rkyse4.JPG?ixlib=rb-4.1.0&amp;q=15&amp;auto=format&amp;w=600&amp;h=400&amp;fit=crop&amp;dpr=3 1800w, https:\/\/images.theconversation.com\/files\/632453\/original\/file-20241117-17-rkyse4.JPG?ixlib=rb-4.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;h=503&amp;fit=crop&amp;dpr=1 754w, https:\/\/images.theconversation.com\/files\/632453\/original\/file-20241117-17-rkyse4.JPG?ixlib=rb-4.1.0&amp;q=30&amp;auto=format&amp;w=754&amp;h=503&amp;fit=crop&amp;dpr=2 1508w, https:\/\/images.theconversation.com\/files\/632453\/original\/file-20241117-17-rkyse4.JPG?ixlib=rb-4.1.0&amp;q=15&amp;auto=format&amp;w=754&amp;h=503&amp;fit=crop&amp;dpr=3 2262w\" >\n            <figcaption>\n              <span class=\"caption\">Achieving 100% canopy cover is possible over streets, even in built-up areas.<\/span>\n              <span class=\"attribution\"><span class=\"source\">Thami Croeser<\/span><\/span>\n            <\/figcaption>\n          <\/figure>\n\n<h2 id=\"putting-the-rule-to-the-test\">Putting the rule to the test<\/h2>\n\n<p>We applied the 3+30+300 rule to a <a href=\"https:\/\/opentrees.org\/\" target=\"_blank\" rel=\"noopener\">global inventory of city trees<\/a> that collates open source data from local governments. We selected cities with the most detailed data for our research, aiming for at least one city on every continent. Unfortunately no suitable data could be identified for cities in Africa, mainland Asia or the Middle East.<\/p>\n\n<p>Our final selection of eight cities features several regarded as leaders in urban forestry and green space development. The City of Melbourne is renowned for its ambitious <a href=\"https:\/\/www.melbourne.vic.gov.au\/urban-forest-strategy\" target=\"_blank\" rel=\"noopener\">Urban Forest Strategy<\/a>. New York is home to successful projects such as <a href=\"https:\/\/www.nycgovparks.org\/trees\/milliontreesnyc\" target=\"_blank\" rel=\"noopener\">MillionTreesNYC<\/a> and <a href=\"https:\/\/www.thehighline.org\/\" target=\"_blank\" rel=\"noopener\">The Highline<\/a>. Singapore is known for lush tropical greenery including standout sites such as <a href=\"https:\/\/www.gardensbythebay.com.sg\/\" target=\"_blank\" rel=\"noopener\">Gardens by the Bay<\/a> and <a href=\"https:\/\/beta.nparks.gov.sg\/visit\/parks\/park-detail\/bishan-ang-mo-kio-park\" target=\"_blank\" rel=\"noopener\">Bishan-Ang Mo Kio Park<\/a>. <\/p>\n\n<p>Analysis of Melbourne and Sydney was restricted to central areas only, based on limitations in the data, while the other six analyses covered whole cities. <\/p>\n\n<p>Most buildings across the eight cities met the three trees requirement but fell short on canopy cover. In contrast, three in four (75%) buildings passed the 30% canopy benchmark in Singapore and almost one in two (45%) passed in Seattle.<\/p>\n\n<p>Just 3% of buildings in Melbourne had adequate neighbourhood canopy cover, despite 44% having views of at least three trees. <\/p>\n\n<p>Central Sydney fared better, although only 17% of city buildings were shaded enough despite 84% having views of at least three trees.<\/p>\n\n<p>Access to parks was also patchy. Cities such as Singapore and Amsterdam scored well on parks, while Buenos Aires and New York City scored poorly. <\/p>\n\n<p>Since completing this study, we partnered with Dutch geospatial firm, <a href=\"https:\/\/www.cobra-groeninzicht.nl\/\" target=\"_blank\" rel=\"noopener\">Cobra Groeninzicht<\/a> to map ten extra cities in Europe, the US and Canada. We found similar results in these cities. <\/p>\n\n<figure class=\"align-center zoomable\">\n            <a href=\"https:\/\/images.theconversation.com\/files\/632865\/original\/file-20241119-15-zmbs08.png?ixlib=rb-4.1.0&amp;q=45&amp;auto=format&amp;w=1000&amp;fit=clip\" target=\"_blank\" rel=\"noopener\"><img  decoding=\"async\"  alt=\"A table illustrating 3+30+300 results using pass\/fail maps of buildings in Sydney, Melbourne, Buenos Aires and Singapore.\"  src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABAQMAAAAl21bKAAAAA1BMVEUAAP+KeNJXAAAAAXRSTlMAQObYZgAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAApJREFUCNdjYAAAAAIAAeIhvDMAAAAASUVORK5CYII=\"  class=\" pk-lazyload\"  data-pk-sizes=\"auto\"  data-ls-sizes=\"(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px\"  data-pk-src=\"https:\/\/images.theconversation.com\/files\/632865\/original\/file-20241119-15-zmbs08.png?ixlib=rb-4.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;fit=clip\"  data-pk-srcset=\"https:\/\/images.theconversation.com\/files\/632865\/original\/file-20241119-15-zmbs08.png?ixlib=rb-4.1.0&amp;q=45&amp;auto=format&amp;w=600&amp;h=339&amp;fit=crop&amp;dpr=1 600w, https:\/\/images.theconversation.com\/files\/632865\/original\/file-20241119-15-zmbs08.png?ixlib=rb-4.1.0&amp;q=30&amp;auto=format&amp;w=600&amp;h=339&amp;fit=crop&amp;dpr=2 1200w, https:\/\/images.theconversation.com\/files\/632865\/original\/file-20241119-15-zmbs08.png?ixlib=rb-4.1.0&amp;q=15&amp;auto=format&amp;w=600&amp;h=339&amp;fit=crop&amp;dpr=3 1800w, https:\/\/images.theconversation.com\/files\/632865\/original\/file-20241119-15-zmbs08.png?ixlib=rb-4.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;h=427&amp;fit=crop&amp;dpr=1 754w, https:\/\/images.theconversation.com\/files\/632865\/original\/file-20241119-15-zmbs08.png?ixlib=rb-4.1.0&amp;q=30&amp;auto=format&amp;w=754&amp;h=427&amp;fit=crop&amp;dpr=2 1508w, https:\/\/images.theconversation.com\/files\/632865\/original\/file-20241119-15-zmbs08.png?ixlib=rb-4.1.0&amp;q=15&amp;auto=format&amp;w=754&amp;h=427&amp;fit=crop&amp;dpr=3 2262w\" ><\/a>\n            <figcaption>\n              <span class=\"caption\">Singapore was the only city to receive a pass mark on all three components of the 3+30+300 rule.<\/span>\n              <span class=\"attribution\"><a class=\"source\" href=\"https:\/\/www.nature.com\/articles\/s41467-024-53402-2\" target=\"_blank\" rel=\"noopener\">Croeser et al., 2024.<\/a><\/span>\n            <\/figcaption>\n          <\/figure>\n\n<h2 id=\"too-small-and-spaced-out\">Too small and spaced out<\/h2>\n\n<p>We were surprised to discover so many buildings around the world had views to at least three trees but still had inadequate neighbourhood canopy cover. This seemed contradictory \u2013 are there enough trees, or not? <\/p>\n\n<p>The issue comes up in other studies too. For example, the city of Nice in France recently <a href=\"https:\/\/www.meet-in-nicecotedazur.com\/en\/smart-city\/nice-continues-its-greening-programme-with-the-3-30-300-approach\/\" target=\"_blank\" rel=\"noopener\">revealed<\/a> 92% of residents have views to three trees, but only 45% had adequate neighbourhood canopy. <\/p>\n\n<p>When we looked into this issue, we found those three trees, visible as they may be, are often too small to create decent shade. <\/p>\n\n<p>Planting density was an issue too. When a city did have large trees, they tended to be very spaced out. <\/p>\n\n<p>Meeting the 3+30+300 rule therefore requires bigger, healthier longer-lived trees, planted closer together. <\/p>\n\n<iframe loading=\"lazy\" src=\"https:\/\/rmituniversity.maps.arcgis.com\/apps\/instant\/portfolio\/index.html?appid=ecf659c0a2ba4367afdb0c52aff981b1\" width=\"100%\" height=\"800\" frameborder=\"0\" style=\"border:0\" allowfullscreen=\"\">iFrames are not supported on this page.<\/iframe>\n\n<h3 id=\"explore-all-three-interactive-maps-zoom-in-or-out-and-search-by-address-or-place-hit-the-i-button-for-more-detail-source-cobra-groeninzicht-2\">Explore all three interactive maps, zoom in or out and search by address or place, hit the \u201ci\u201d button for more detail. Source: <a href=\"https:\/\/www.cobra-groeninzicht.nl\/\" target=\"_blank\" rel=\"noopener\">Cobra Groeninzicht<\/a><\/h3>\n\n<h2 id=\"city-living-is-tough-for-trees\">City living is tough for trees<\/h2>\n\n<p>Many of our roads and footpaths sit on a base of compacted crushed rock, topped by impermeable asphalt or paving. This means very little water reaches tree roots, and there isn\u2019t much space for the roots to grow. As a result, street trees grow slowly, die young, and are more susceptible to <a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S161886672400044X\" target=\"_blank\" rel=\"noopener\">pests<\/a>, <a href=\"https:\/\/academic.oup.com\/forestry\/article\/83\/4\/451\/546615\" target=\"_blank\" rel=\"noopener\">disease<\/a> and <a href=\"https:\/\/extension.psu.edu\/abiotic-urban-tree-stressors\" target=\"_blank\" rel=\"noopener\">heat stress<\/a>. <\/p>\n\n<p>Above ground, trees face further challenges. Power companies have legal powers to demand sometimes <a href=\"https:\/\/www.abc.net.au\/news\/2024-11-07\/tree-canopy-cover-urban-heat-island\/104567914\" target=\"_blank\" rel=\"noopener\">excessive<\/a> amounts of pruning. Residents and developers <a href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S2210670720300834\" target=\"_blank\" rel=\"noopener\">frequently request tree removals<\/a>, often successfully. <\/p>\n\n<p>This trifecta of high removal rates, heavy pruning and tough growing conditions mean large, healthy canopy trees are rare. <\/p>\n\n<p>Planting new trees is surprisingly difficult too. Engineering standards often act against tree planting by requiring large clearances from driveways, underground pipes, or even parking spaces. <\/p>\n\n<p>Instead of managing potential conflicts, trees are often simply deleted from streetscape plans. Sparse planting is the result. <\/p>\n\n<figure class=\"align-center zoomable\">\n            <a href=\"https:\/\/images.theconversation.com\/files\/632454\/original\/file-20241117-15-l7mhqk.jpg?ixlib=rb-4.1.0&amp;q=45&amp;auto=format&amp;w=1000&amp;fit=clip\" target=\"_blank\" rel=\"noopener\"><img  decoding=\"async\"  alt=\"The canopy of this street tree has been butchered to provide the required clearance around powerlines\"  src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABAQMAAAAl21bKAAAAA1BMVEUAAP+KeNJXAAAAAXRSTlMAQObYZgAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAApJREFUCNdjYAAAAAIAAeIhvDMAAAAASUVORK5CYII=\"  class=\" pk-lazyload\"  data-pk-sizes=\"auto\"  data-ls-sizes=\"(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px\"  data-pk-src=\"https:\/\/images.theconversation.com\/files\/632454\/original\/file-20241117-15-l7mhqk.jpg?ixlib=rb-4.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;fit=clip\"  data-pk-srcset=\"https:\/\/images.theconversation.com\/files\/632454\/original\/file-20241117-15-l7mhqk.jpg?ixlib=rb-4.1.0&amp;q=45&amp;auto=format&amp;w=600&amp;h=452&amp;fit=crop&amp;dpr=1 600w, https:\/\/images.theconversation.com\/files\/632454\/original\/file-20241117-15-l7mhqk.jpg?ixlib=rb-4.1.0&amp;q=30&amp;auto=format&amp;w=600&amp;h=452&amp;fit=crop&amp;dpr=2 1200w, https:\/\/images.theconversation.com\/files\/632454\/original\/file-20241117-15-l7mhqk.jpg?ixlib=rb-4.1.0&amp;q=15&amp;auto=format&amp;w=600&amp;h=452&amp;fit=crop&amp;dpr=3 1800w, https:\/\/images.theconversation.com\/files\/632454\/original\/file-20241117-15-l7mhqk.jpg?ixlib=rb-4.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;h=568&amp;fit=crop&amp;dpr=1 754w, https:\/\/images.theconversation.com\/files\/632454\/original\/file-20241117-15-l7mhqk.jpg?ixlib=rb-4.1.0&amp;q=30&amp;auto=format&amp;w=754&amp;h=568&amp;fit=crop&amp;dpr=2 1508w, https:\/\/images.theconversation.com\/files\/632454\/original\/file-20241117-15-l7mhqk.jpg?ixlib=rb-4.1.0&amp;q=15&amp;auto=format&amp;w=754&amp;h=568&amp;fit=crop&amp;dpr=3 2262w\" ><\/a>\n            <figcaption>\n              <span class=\"caption\">Conservative powerline clearance rules requiring intense pruning of street trees are being challenged by urban forestry experts.<\/span>\n              <span class=\"attribution\"><span class=\"source\">Thami Croeser<\/span><\/span>\n            <\/figcaption>\n          <\/figure>\n\n<h2 id=\"finding-solutions-to-nurture-tree-canopy\">Finding solutions to nurture tree canopy<\/h2>\n\n<p>Fortunately, there are solutions to all of these issues. <\/p>\n\n<p><a href=\"https:\/\/www.linkedin.com\/pulse\/8-key-steps-fix-melbournes-urban-forests-thami-croeser-2sgac\/\" target=\"_blank\" rel=\"noopener\">Legal reforms<\/a> to put trees on equal footing with other infrastructure would be a great place to start. Trees do come with risks as well as benefits, but we need to manage those risks rather than settling for hot, desolate streets. <\/p>\n\n<p>Better planting standards will be important too. Technology already exists to create <a href=\"https:\/\/citygreen.com\/product-category\/soil-vault-systems\/\" target=\"_blank\" rel=\"noopener\">larger soil volumes under footpaths and roads<\/a>. Clever <a href=\"https:\/\/www.porouslane.com.au\/\" target=\"_blank\" rel=\"noopener\">asphalt-like materials<\/a> (often called \u201cpermeable paving\u201d) allow rain to infiltrate soils. These approaches cost more, but they work very well. Not only do they potentially <a href=\"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/S0169204618304420\" target=\"_blank\" rel=\"noopener\">double tree growth<\/a> rates trees, but they also help reduce flood risks and minimise issues such as roots blocking drains or causing bumpy footpaths. <\/p>\n\n<p>Our study is a clear call to action for cities to expand, maintain and protect their urban forests and parks to prepare for climate change. With <a href=\"https:\/\/www.abc.net.au\/news\/2024-10-12\/australia-facing-one-of-hottest-summers-on-record-bom\/104464014\" target=\"_blank\" rel=\"noopener\">another record-breaking summer predicted<\/a>, hot on the heels of the <a href=\"https:\/\/climate.copernicus.eu\/copernicus-2023-hottest-year-record\" target=\"_blank\" rel=\"noopener\">world\u2019s hottest year<\/a>, growing tree canopy has never been more urgent. We must push forward with these reforms and ensure our urban populations have all the green infrastructure they need to protect them into the future. <!-- Below is The Conversation's page counter tag. Please DO NOT REMOVE. --><img  loading=\"lazy\"  decoding=\"async\"  src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABAQMAAAAl21bKAAAAA1BMVEUAAP+KeNJXAAAAAXRSTlMAQObYZgAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAApJREFUCNdjYAAAAAIAAeIhvDMAAAAASUVORK5CYII=\"  alt=\"The Conversation\"  width=\"1\"  height=\"1\"  style=\"border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important\"  referrerpolicy=\"no-referrer-when-downgrade\"  class=\" pk-lazyload\"  data-pk-sizes=\"auto\"  data-pk-src=\"https:\/\/counter.theconversation.com\/content\/243829\/count.gif?distributor=republish-lightbox-basic\" ><!-- End of code. If you don't see any code above, please get new code from the Advanced tab after you click the republish button. The page counter does not collect any personal data. More info: https:\/\/theconversation.com\/republishing-guidelines --><\/p>\n\n<figure class=\"align-center zoomable\">\n            <a href=\"https:\/\/images.theconversation.com\/files\/632457\/original\/file-20241117-15-rehdb0.PNG?ixlib=rb-4.1.0&amp;q=45&amp;auto=format&amp;w=1000&amp;fit=clip\" target=\"_blank\" rel=\"noopener\"><img  decoding=\"async\"  alt=\"Photo comparing two trees in a city trial of specialised soil volume systems, showing much more vigorous growth in the tree planted in a soil vault\"  src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABAQMAAAAl21bKAAAAA1BMVEUAAP+KeNJXAAAAAXRSTlMAQObYZgAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAApJREFUCNdjYAAAAAIAAeIhvDMAAAAASUVORK5CYII=\"  class=\" pk-lazyload\"  data-pk-sizes=\"auto\"  data-ls-sizes=\"(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px\"  data-pk-src=\"https:\/\/images.theconversation.com\/files\/632457\/original\/file-20241117-15-rehdb0.PNG?ixlib=rb-4.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;fit=clip\"  data-pk-srcset=\"https:\/\/images.theconversation.com\/files\/632457\/original\/file-20241117-15-rehdb0.PNG?ixlib=rb-4.1.0&amp;q=45&amp;auto=format&amp;w=600&amp;h=314&amp;fit=crop&amp;dpr=1 600w, https:\/\/images.theconversation.com\/files\/632457\/original\/file-20241117-15-rehdb0.PNG?ixlib=rb-4.1.0&amp;q=30&amp;auto=format&amp;w=600&amp;h=314&amp;fit=crop&amp;dpr=2 1200w, https:\/\/images.theconversation.com\/files\/632457\/original\/file-20241117-15-rehdb0.PNG?ixlib=rb-4.1.0&amp;q=15&amp;auto=format&amp;w=600&amp;h=314&amp;fit=crop&amp;dpr=3 1800w, https:\/\/images.theconversation.com\/files\/632457\/original\/file-20241117-15-rehdb0.PNG?ixlib=rb-4.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;h=394&amp;fit=crop&amp;dpr=1 754w, https:\/\/images.theconversation.com\/files\/632457\/original\/file-20241117-15-rehdb0.PNG?ixlib=rb-4.1.0&amp;q=30&amp;auto=format&amp;w=754&amp;h=394&amp;fit=crop&amp;dpr=2 1508w, https:\/\/images.theconversation.com\/files\/632457\/original\/file-20241117-15-rehdb0.PNG?ixlib=rb-4.1.0&amp;q=15&amp;auto=format&amp;w=754&amp;h=394&amp;fit=crop&amp;dpr=3 2262w\" ><\/a>\n            <figcaption>\n              <span class=\"caption\">Trees planted in specialised soil volume systems grow much faster, as do trees with proper access to water. In this trial, the tree on the right was planted in a soil vault, while the tree on the left (planted at the same time) was not.<\/span>\n              <span class=\"attribution\"><span class=\"source\">CityGreen<\/span><\/span>\n            <\/figcaption>\n          <\/figure>\n\n  <p><span><a href=\"https:\/\/theconversation.com\/profiles\/thami-croeser-729067\" target=\"_blank\" rel=\"noopener\">Thami Croeser<\/a>, Research Fellow, Centre for Urban Research, <em><a href=\"https:\/\/theconversation.com\/institutions\/rmit-university-1063\" target=\"_blank\" rel=\"noopener\">RMIT University<\/a><\/em><\/span><\/p>\n\n  <p>This article is republished from <a href=\"https:\/\/theconversation.com\" target=\"_blank\" rel=\"noopener\">The Conversation<\/a> under a Creative Commons license. Read the <a href=\"https:\/\/theconversation.com\/we-rated-the-urban-forests-of-8-global-cities-only-singapore-passed-the-30-canopy-test-243829\" target=\"_blank\" rel=\"noopener\">original article<\/a>.<\/p>\n<\/div>\n\n","protected":false},"excerpt":{"rendered":"Ryan DeBerardinis, Shutterstock Thami Croeser, RMIT University Can you see three trees from your home, school or workplace?&hellip;\n","protected":false},"author":1016,"featured_media":13171,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","fifu_image_url":"https:\/\/images.pexels.com\/photos\/5623971\/pexels-photo-5623971.jpeg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=1","fifu_image_alt":"","footnotes":""},"categories":[13,15],"tags":[2343,2357,2349,2347,2353,2361,2352,2356,2362,2351,474,2348,2344,2345,2354,2350,2358,2346,2359,2355,2360],"class_list":{"0":"post-13169","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-earth","8":"category-engineering","9":"tag-330300-rule","10":"tag-climate-change-adaptation","11":"tag-compacted-soils-for-trees","12":"tag-greener-cities","13":"tag-melbourne-tree-canopy","14":"tag-park-accessibility","15":"tag-permeable-paving-benefits","16":"tag-singapore-urban-forest","17":"tag-sustainable-city-planning","18":"tag-sydney-tree-cover","19":"tag-the-conversation","20":"tag-tree-canopy-benefits","21":"tag-tree-canopy-cover","22":"tag-tree-planting-density","23":"tag-urban-forestry-strategies","24":"tag-urban-forests","25":"tag-urban-green-infrastructure","26":"tag-urban-greenery","27":"tag-urban-heat-resilience","28":"tag-urban-tree-challenges","29":"tag-urban-tree-pruning-issues","30":"cs-entry","31":"cs-video-wrap"},"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/posts\/13169","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/users\/1016"}],"replies":[{"embeddable":true,"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/comments?post=13169"}],"version-history":[{"count":1,"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/posts\/13169\/revisions"}],"predecessor-version":[{"id":13170,"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/posts\/13169\/revisions\/13170"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/media\/13171"}],"wp:attachment":[{"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/media?parent=13169"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/categories?post=13169"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/tags?post=13169"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}