EDWARD TENNER: The Other Global Toxic Cloud: China’s Pollution. “Prevailing winds across the Pacific are pushing thousands of tons of other contaminants–including mercury, sulfates, ozone, black carbon, and desert dust–over the ocean each year. Some of this atmospheric junk settles into the cold waters of the North Pacific, but much of it eventually merges 
with the global air pollution pool that circumnavigates the planet.”