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A central figure in the environmental movement of the 1960s and 1970s, Brand now thinks people need to manipulate natural systems to forestall the effects of global warming.
Barring significant emissions reductions, U.K.'s national science academy sees engineering to remove greenhouse gases or absorb less solar radiation as a way to combat climate change.
Trying to mimic the cooling effects of volcanic eruptions by injecting sulfur into the atmosphere would badly damage the ozone layer, an NCAR study concludes.
A professor argues that it's possible to put a break on climate change by injecting sulfates above the stratosphere.
Shields in space, artificial volcanic eruptions, pumping carbon dioxide underground, ocean fertilization--all these "geoengineering" ideas are being discussed, says Harvard professor.
Science Magazine reports that Bill Gates has spent at least $4.5 million to fund academic energy and climate research, some of which touches on the controversial topic of geoengineering.
In a report, the U.K.'s Institution of Mechanical Engineers concludes that artificial trees, algae-growing buildings, and white roofs offer the most promise.
Geoengineers are considering some drastic measures to slow global warming. Are they safe for the future?
Some companies are developing techniques for making charcoal as a way to store carbon underground, but a group of conservationist warn against large-scale use.
Time to assess different climate engineering approaches--be it injecting light-blocking particles in the atmosphere or artificial trees--say academics at an MIT symposium.