Researchers: The climate change we caused is here for at least 50,000 years—and probably far longer phys.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from phys.org Daily Mail and Mail on Sunday newspapers.
In 2000, Paul Crutzen rose to speak at the International Geosphere-Biosphere Programme in Mexico. He was then one of the world's most cited scientists, a Nobel laureate working on huge problems the ozone hole, the effects of a nuclear winter.