The Impacts of Pavement on the Environment

The U. N released numbers about how we need to reduce the amount of particulates in the air by 50 % on p m two point fiveand that's already hard to fathom. i'm wondering, when did you initially realize that pavement was a key part of many of these environmental ills that we're seeing? I had a growing sense that we needed to look at pavement, look at the ground plain, and particular in cities,. but it was also about ten years ago, maybe fe than 10 years ago or something, when i moved to chicago.