Can we artificially cool the planet? A major environmental group is spending millions to find out

A major environmental group is reportedly set to funnel millions of dollars into research on solar geoengineering, a proposed fix for climate change that has garnered skepticism and even fears about unintended consequences. Solar geoengineering encompasses a range of tactics to cool the planet down by reflecting sunlight, perhaps by artificially brightening clouds or thrusting reflective particles into the atmosphere.

Heated talks at the United Nations Environment Assembly in March failed to result in new international guidelines for solar geoengineering. Since 2010, there’s been an outdated global moratorium on certain kinds of large-scale geoengineering. The language is vague, excluding small-scale experiments that have moved forward in recent years. Last week, Alameda, California, voted to prevent University of Washington scientists from testing new technology to spray sea salt particles.

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Environmental Impact of War and Military Motivations for PeaceSaleem H. Ali is Chair of the Department of Geography and Spatial Sciences and the Blue & Gold Distinguished Professor of Energy and the Environment at the University of Delaware (USA).
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