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1,641,662 views | James Hansen • TED2012

James Hansen : Pourquoi je dois parler haut et fort du changement climatique

James Hansen, éminent chercheur, raconte l'histoire de son engagement dans la science et le débat autour du changement climatique mondial. Ce faisant, il expose brièvement les preuves que le changement est en cours et pourquoi cela l'inquiète profondément quant à l'avenir.

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James Hansen, éminent chercheur, raconte l'histoire de son engagement dans la science et le débat autour du changement climatique mondial. Ce faisant, il expose brièvement les preuves que le changement est en cours et pourquoi cela l'inquiète profondément quant à l'avenir.

This talk was presented at an official TED conference. TED's editors chose to feature it for you.

Join Citizens' Climate Lobby and let your representatives know where you stand on climate change.

Subscribe to Dr. Hansen's newsletter and get updates on his program on climate science, awareness and solutions.

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James Hansen has made key insights into our global climate -- and inspired a generation of activists and scientists.

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