U.S. greenhouse gas emissions fell by 10% in 2020 on January 15, 2021January 15, 2021 U.S. greenhouse gas emissions fell by 10% in 2020. GET THE FULL STORY Photo credit: Eden, Janine and Jim from New York City – 5 MPH Black Lives Matter, CC BY 2.0, link. Share this:Click to share on Facebook (Opens in new window)Like this:Like Loading...