How Climate Scientists Parallel Early Atomic Scientists
Lasrick writes "Kennette Benedict writes in the Bulletin of the Atomic Scientists about the existential threat of climate change, and how the scientists who study and write about it are similar to the early atomic scientists who created, and then worried about, the threat that nuclear weapons posed to humanity: 'Just as the Manhattan Project participants could foresee the coming arms race, climate scientists today understand the consequences of deploying the technologies that defined the industrial age. They also know that action now to reduce greenhouse gas emissions will mitigate the worst consequences of climate change, just as the Manhattan Project scientists knew that early action to forestall a deadly arms race could prevent nuclear catastrophe.'"
We still have some of the lowest CO2 concentrations in earth's history right now, and our climate has been changing rapidly (in fact, oscillating wildly) for the past 7 million years or so. To stop these oscillations, CO2 concentrations would have to go up substantially.
http://en.wikipedia.org/wiki/Paleoclimatology