I am currently under the impression that the Oceans act like a big sponge. They absorb CO2. However when the temperature rises it releases that CO2. Most reports give a rise of about 1 degree over the last half century. I am also aware that the ocean floor is littered with volcanoes, sea mounts, and is encircled by a huge rift which goes right up the Atlantic across the Pacific and around Antarctica. I am aware of no such force on the earth caused by man which could generate so much heat. How do people know global warming isn't a natural consequence of the environment changing rather than human influence? Specifically... This page says 31,000 scientists claim humans are not responsible for global warming. http://nov55.com/gbwm.html The petition. http://www.oism.org/pproject/ My question is... Has anyone proven this beyond a shadow of a doubt that humans are indeed solely responsible for causing the climate change? If so... What percentage is a result of man, and what percentage is a result of natural climate change?