Could More Urban Trees Mitigate Runoff and Flooding? JSTOR Daily
"...The researchers acknowledge that planting trees can be costly, but much less so than the damage that flooding can cause. A conventional parking lot could cost 53,000 euros, and a green infrastructure parking lot would cost an estimated 27 percent more. Beyond water absorption, however, trees provide carbon dioxide storage and shade and reduce pollution, all factors that help mitigate the effects of climate change..."