Shell and Exxon's secret 1980s climate change warnings | Benjamin Franta

Newly found documents from the 1980s show that fossil fuel companies privately predicted the global damage that would be caused by their products.

One day in 1961, an American economist named Daniel Ellsberg stumbled across a piece of paper with apocalyptic implications. Ellsberg, who was advising the US government on its secret nuclear war plans, had discovered a document that contained an official estimate of the death toll in a preemptive "first strike" on China and the Soviet Union: 300 million in those countries, and double that globally.

Ellsberg was troubled that such a plan existed; years later, he tried to leak the details of nuclear annihilation to the public. Although his attempt failed, Ellsberg would become famous instead for leaking what came to be known as the Pentagon Papers - the US government's secret history of its military intervention in Vietnam.