The City Council in Alameda, Calif., voted to stop tests of a device that could one day cool the Earth. Scientists and city staff had previously concluded the tests posed no risk. The City Council in Alameda, Calif., voted to stop tests of a device that could one day cool the Earth. Scientists and city staff had previously concluded the tests posed no risk. Global Warming, Greenhouse Gas Emissions, Geoengineering, Oceans and Seas, University of Washington, Alameda (Calif), marine cloud brightening NYT > Science