Pennsylvania's decline in some greenhouse gas emissions is bucking the national trend.
By the numbers: The Keystone State'senergy-related carbon dioxide emissionsdropped 30.4% between 1970 and 2021, per the U.S. Energy Information Administration.
Nationally, overall emissions rose 15.4%.
Yes, but: After Pennsylvania's emissions dipped in the pandemic year of 2020, they ticked up 10% in 2021.