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© Emily Kask for The New York Times

The United States is largely absent from the United Nations climate negotiations in Brazil. So who is stepping up?

© Fernando Llano/Associated Press

With this year’s global climate summit opening in Brazil, we offer a glimpse of how the Trump administration sometimes operates behind closed doors.

© Fernando Llano/Associated Press

The multibillion-dollar fund would essentially pay countries to keep forests standing, hoping for success where earlier forest-protection ideas have struggled.

© Jorge Silva/Reuters