Here's how much people are willing to pay for clean air: https://epic.uchicago.edu/news-events/news/how-much-will-people-pay-clean-air …pic.twitter.com/PbvLOlm9Pq
10:23 AM - 22 Jul 2016
0 replies
2 retweets
0 likes
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.