Climate activists take part in a demonstration Monday in London, where police say they've arrested dozens of protesters as the Extinction Rebellion group attempts to draw attention to climate change.
Stacy Jupiter, a newly named MacArthur Fellow, poses with a puppet used in a show she staged for kids about how to protect fish. Jupiter is a marine scientist who works on ocean issues in Fiji.
Greta Thunberg, the 16-year-old leader of a global protest against inaction on climate change, marched at a rally in New York City Friday. Around the world, millions of other people joined her.
Eduardo Munoz Alvarez/AP
Several of the fires burning in the Amazon rainforest can be seen even from space, as evidenced by this satellite image provided by NASA this month. Brazil's National Institute for Space Research said the country has seen a record number of wildfires this year.
NASA via AP
Bangladeshi commuters use boats to cross the Buriganga River in the capital Dhaka in 2018. In July, Bangladesh's top court granted all the country's rivers the same legal rights as humans.
Munir Uz Zaman/AFP/Getty Images
Darrell Blatchley, environmentalist and director of D' Bone Collector Museum, shows plastic waste found in the stomach of a Cuvier's beaked whale near the Philippine city of Davao.
U.S. Department of Homeland Security Secretary Kirstjen Nielsen speaks in front of a newly fortified border wall structure in Calexico, Calif. in October. A federal court ruled Monday that DHS has broad authority to waive environmental regulations in the name of border security.