CDC/UNSPLASH
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CDC/UNSPLASH
Ye Jinghan/Unsplash
U.S. Air Force photo by Roland Balik
Oran Viriyincy/Flickr
American Public Power Association
South Baltimore Land Trust
Klaus Eppele/Adobe Stock
Derrick Z. Jackson/UCS
Jonathan Ford/Unsplash
Reject Keystone XL -- NOW Protest Seattle. Damien Conway/flickr
NurPhoto/Getty Images
Thomas Hawk/flickr
Tim Evanson/Flickr
US Army/army.mil
National Cancer Institute/Unsplash
Christos Bacharakis/Flickr
Kane Reinholdtsen/Unsplash
Steve Debenport/Getty Images
Katarzyna Nowak
Melody Tan
Eleanor Fort/UCS
Marcia Cassidy Communications
US EPA