Has the U.S. set realistic goals to combat climate change? A climate scientist weighs in (Apr 22, 2021)April 22, 2021The US has pledged to halve its carbon emissions by 2030. (April 22, 2021)April 22, 2021 Published by Philly Web Team on April 22, 2021 Categories Tags Ray Pierrehumbert and Dr. Mann’s latest op-ed for The Guardian. Share Philly Web Team
