The authors conclude that "
a global governance agreement for geoengineering is essential before any practical geoengineering system is deployed".
"It is clear that reducing greenhouse gases emissions is the first, most fundamental, and most essential element of reducing harms from climate change," says Edward Parson, a law professor and co-director of the Emmett Center on Climate Change and the Environment at the University of California, Los Angeles.
"Geoengineering is at best a partial or second choice."
In another paper, published in Science (14 March), Parson and
David Keith, a physicist at Harvard University, argue for internationally coordinated and transparent research on geoengineering.
"In our paper
we do not advocate geoengineering," Parson says. "Instead we advocate research into geoengineering so the capability is available and tested. Recognising that geoengineering may cause harm, and that it cannot reverse all effects of climate change, does not negate the value of having the capability available."
http://www.scidev.net/global/earth-...row-over-effects-of-solar-geoengineering.html