USEPA
Guest Commentary
Guest authors bring their insights to The Equation, providing commentary on a broad range of issues that connect to our work. Views expressed here belong to the authors, not UCS.
USEPA
AvailableLight/Getty Images
Bruce Bennett/Getty Images
Grant Baldwin/Getty Images
ferrantraite/Getty Images
Fei Yang/Getty Images
SolStock/Getty Images
Joe Raedle/Getty Images
Phil Roeder/Wikimedia Commons
cosmin4000/Getty Images
Tom Daly
Nadine Shaabana/Unsplash
Pixabay/Pexels
Catie Cleveland/College of Charleston
Jesse Springer
Trinh Trần/Pexels
Alex Levine/Flickr
ASSOCIATED PRESS
Myrriah Gómez
Gretchen Goldman/UCS
Tom Daly
Edmond Dantès/Pexels
Sara Faraj
Sara Faraj