Making roofs white or reflective is the best way to keep a city cool

So-called “cool roofs” would bring down the average air temperature in cities like London during a heatwave more than green roofs, trees or solar panels do

​So-called “cool roofs” would bring down the average air temperature in cities like London during a heatwave more than green roofs, trees or solar panels do So-called “cool roofs” would bring down the average air temperature in cities like London during a heatwave more than green roofs, trees or solar panels do