2008 Scientific American GEOENGINEERING
A Sunshade for Planet Earth
“The idea is to inject several million tons a year of sulfur dioxide (SO2) into the stratosphere.”
“THE DOWNSIDES
UNPREDICTABLE CHANGES in regional wind and rainfall patterns
REDUCED EVAPORATION, leading to reduction in global rainfall
INCREASING ACID RAIN, possibly polluting pristine ecosystems
ACCELERATED DESTRUCTION of ozone layer, causing higher incidence of cancer
CHEAP ENOUGH to be done unilaterally, without international agreements which could increase global tensions
CONTINUAL MAINTENANCE required;
Link to Geoengineering SCIAM 2008
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