Heat has caused more deaths in the U.S. than hurricanes, tornadoes or floods in recent years. Scientists say tree planting and the whitest white paint will temper urban “heat islands.”
Other scientists see the value of simpler tools: shovels and paintbrushes.
The shovels are for planting trees, whose shade has been shown to lower air temperatures in sweltering cities by up to 45 degrees Fahrenheit; the brushes for painting rooftops and other dark surfaces light colors that limit the absorption of temperature-raising sunlight. More trees and more reflective surfaces won’t stop climate change. But they could refashion cities for a warming world, tempering what scientists call “heat islands” caused by heat-absorbing rooftops, building materials and roads that make urban areas hotter than the surrounding countryside.
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