Shade : the promise of a forgotten natural resource

"On a 90-degree day in Los Angeles, bus riders across the city line up behind the shadows cast by street signs and telephone poles, looking for a little relief from the sun's glaring heat. Every summer such scenes play out in cities across the United States, and as Sam Bloch argues, we ignore the benefits of shade at our own peril. Heatwaves are now the country's deadliest natural disasters with victims concentrated in poorer, less shady areas. P...