Trees Are Real Cooling Infrastructure
Two new studies, one in Nature Communications and one from the Healthy Green Spaces Coalition, found that urban tree cover can cancel about half of the heat island effect. Across 65 American cities, neighborhoods with rich canopy ran nearly 4°F (~2.2°C) cooler than treeless ones nearby, with residents experiencing 20 to 40% less excess heat. Extreme heat already kills more Americans each year than every other extreme weather event combined, so the gap between a leafy block and a bare one is functionally a public health gap. The catch, per Nature Conservancy lead scientist Robert McDonald, is that planting trees only offsets about 20% of the warming climate change will keep adding. Cities will still need other techniques like reflective rooftops to handle the rest. Even so, this is a rare climate intervention where biodiversity and public-health co-benefits already sit inside the price tag. Cities that figure out what to plant and where will get more out of a tree budget than out of almost any other climate line item.Two new studies, one in Nature Communications and one from the Healthy Green Spaces Coalition, found that urban tree cover can cancel about half of the heat island effect. Across 65 American cities, neighborhoods with rich canopy ran nearly 4°F (~2.2°C) cooler than treeless ones nearby, with residents experiencing 20 to 40% less excess heat. Extreme heat already kills more Americans each year than every other extreme weather event combined, so the gap between a leafy block and a bare one is functionally a public health gap. The catch, per Nature Conservancy lead scientist Robert McDonald, is that planting trees only offsets about 20% of the warming climate change will keep adding. Cities will still need other techniques like reflective rooftops to handle the rest. Even so, this is a rare climate intervention where biodiversity and public-health co-benefits already sit inside the price tag. Cities that figure out what to plant and where will get more out of a tree budget than out of almost any other climate line item.Expert summary pending. Showing the newcomer version.