"Il est déjà trop tard" : l'espèce humaine devrait s'éteindre ce siècle. The Story Group | Multimedia journalism. World Resources Report | Global Warming, Climate Change, Ecosystems, Sustainable Markets, Good Governance & the Environment. Le climat de la Terre - CNRS sagascience. Climate Change. The Science.
“If humanity wishes to preserve a planet similar to that on which civilization developed and to which life on Earth is adapted, paleoclimate evidence and ongoing climate change suggest that CO2 will need to be reduced from [current levels] to at most 350 ppm.”Dr. James Hansen That’s Dr. James Hansen talking, former head of the Goddard Institute for Space Studies. Dr. Hansen is one of the most respected climatologists in the world, and when he says that climate change is incompatible with human civilization, we think human civilization ought to sit up and take notice. A simplified version of our climate crisis. That “350 ppm” is where 350.org gets its name. Since the beginning of human civilization, our atmosphere contained about 275 ppm of carbon dioxide.
Right now we’re at 400 ppm, and we’re adding 2 ppm of carbon dioxide to the atmosphere every year. So far, we’ve experienced about 1 degree (Celsius) of warming, and the impacts are frightening. This is the science of climate change. Icy Seas | Scientific Musings of a Sailor in a Changing Climate. La question qui tue ! :-) Climate Change: Where We Are Now and Where We Are Going? Terres. "Politicians discussing global warming." For RENTE ... CHANGEMENT CLIMATIQUE. Planète : dérèglement climatique.