Mongabay: Look at most climate change projection graphs and you will see a smoothly rising red line of increasing temperature, melting ice and other impacts. But climate does not work that way. Studies of the paleoclimate record indicate that when heat energy is rapidly added to the atmosphere -- as humans are doing today -- the climate can experience tipping points, with abrupt shifts and potentially disastrous results.
Researchers who have studied economic climate change impacts have until recently...