The climate change we caused is here for at least 50,000 years—and probably far longer
Credit: CC0 Public Domain
In February 2000, Paul Crutzen rose to speak at the International Geosphere-Biosphere Programme in Mexico. And when he spoke, people took notice. He was then one of the world's most cited scientists, a Nobel laureate working on huge-scale problems—the ozone hole, the effects of a nuclear winter.
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