Green Cities Could Cut Emissions by a Quarter, Study Shows
European cities could reduce greenhouse gas emissions by up to 25% by planting trees, building green roofs, and expanding parks, according to new research. For urban planners and municipal leaders facing climate targets, the finding suggests nature-based solutions offer a faster, cheaper path to carbon reduction than relying on technology alone.
Originaltitel: How Nature Can Help Cities Breathe and Stay Cool
Naturbaserade lösningar kan minska städers växthusgasutsläpp med genomsnittligt 17 procent, och upp till 25 procent i vissa fall—ett resultat som förändrar investeringskalkylerna för klimatanpassade urbana infrastrukturprojekt. Forskarna analyserade europeiska städer för att quantifiera effekten av träd, parker och gröna tak på utsläppsreduktion. Naturbaserade lösningar minskar växthusgaser genom kollagring, luftkylning och reducerad energikonsumtion. Studien genomfördes av Stockholm University tillsammans med forskare från Kina, inklusive Shanghai Jiao Tong University och Shenzhen Urban Planning & Design Institute. För hållbarhetschefer och infrastrukturplanerare är detta kritiskt: grönstruktur blir nu räknebar klimatinvestering, inte bara estetik eller biodiversitet. Lösningarna skapar samtidigt lokala co-benefits—luftrening, översvämningsreducering och ekosystemstöd—vilket accelererar vägen mot kommunala klimatmål utan att vänja sig vid rent tekniska åtgärder.
More and more people are moving to cities, which means cities play a big role in both causing and solving climate change. Cities produce about 70% of global greenhouse gases (GHGs), so finding ways to reduce these is key to reaching climate change goals. One way to reduce GHGs is through nature-based solutions—using nature, like trees, parks, and green roofs, to make cities greener and healthier. Nature-based solutions can lower GHGs by storing carbon, cooling the air, and reducing energy use. They also make cities better places to live by cleaning the air, reducing floods, and supporting biodiversity. In this study, we looked at cities in Europe to understand how much nature-based solutions can reduce GHGs. We found that nature-based solutions could cut city GHGs by an average of 17%, and up to 25% in some cities. Working with nature can help cities reach their climate goals faster and more sustainably.