Associated Press: It's the option climate negotiators here are loath to talk about.
What if they fail to curb global warming and the environment gets so dangerous that someone decides to do something drastic and play mad scientist? Should nations purposely pollute the planet to try to counteract man-made warming and cool the world? Scientists are pretty sure they can do it, but should they?
The issue is called geoengineering -- purposely tinkering with the planet as opposed to the unintentional warming that's...