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. 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 Shady trees are good for health and wellbeing