The Economist considers the concept of planetary engineering planet-scale projects, such as injecting the upper atmosphere with sun-deflecting sulfur as a solution to global warming. I much prefer the idea of developing new non-carbon technologies or experimenting with technology to deflect or arrest warming to throwing the global economy into a permanent slowdown.
This article available online at:
http://www.theatlantic.com/daily-dish/archive/2008/09/technology-and-climate-change/211550/
