Scientific American: Attempts to counter global warming by modifying Earth's atmosphere have been thrust into the spotlight following last week's report from the United Nations Intergovernmental Panel on Climate Change (IPCC).
Mention of geoengineering in the report summary was brief, but it suggests that the controversial area is now firmly on the scientific agenda. Some climate models suggest that geoengineering may even be necessary to keep global temperature rises to below 2 °C above pre-industrial levels....