A Brazilian soldier puts out fires at the Nova Fronteira region in Novo Progresso, Brazil, Sept. 3, 2019 (AP photo by Leo Correa).

Tensions have simmered for decades between Brazil, which believes the Amazon rainforest is a sovereign resource, and wealthy developed countries concerned with protecting one of the world’s most important carbon sinks. But it wasn’t until last summer that, amid growing international concern over climate change, deforestation in the Amazon provoked a high-level diplomatic spat. As fires raged in the Amazon, most of them set by farmers and ranchers to clear land, French President Emmanuel Macron proclaimed the issue was an international crisis and said he would put it on the agenda of the G-7 summit in Biarritz. German Chancellor Angela […]

A student protester holds up a foam replica of the earth during the Youth Climate Strike at Columbus Circle in New York City, March 15, 2019 (Sipa photo by Anthony Behar via AP Images).

The biggest challenge humanity faces this century is ensuring that the march of civilization does not degrade the global environment so much that we irreparably harm the planet on which our own survival depends. The advent of the Anthropocene—a new geological era in which humanity is the most important force shaping the biosphere—has revealed a fundamental contradiction between the Earth’s own integrated natural systems and a hopelessly fragmented international system. The former is an ecological and geophysical whole, as apparent in the famous “Earthrise” photograph taken by Apollo 8 astronauts on Christmas Eve, 1968. The latter is an artificial human […]