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Mammatus clouds (DI02037) Photo by Ben Foster
Mammatus clouds (DI02038) Photo by Ben Foster
Mammatus clouds (DI02036) Photo by Ben Foster
Climate projections (DI02697), Graphic by Carlye Calvin
Ice covered thistle (DI01569), Photo by Carlye Calvin
Inter-cloud lightning with a mountain silhouette (DI02714), Photograph by Greg Thompson
Lightning (DI02713), Photograph by Greg Thompson
Erosion in Hawaii (DI01182), Photo by Carlye Calvin
Night sky with lightning (DI02701), Photograph by Greg Thompson
Switching from coal to natural gas (DI02696)
Lightning (DI02702), Photograph by Greg Thompson