In the 1970s, acid rain was one of the most serious environmental threats in North America and Europe. The air was so laden with pollution from coal power plants and cars at the time that it turned ...
they would have generated acid rain, and sulfate molecules would have blocked sunlight and cooled the planet. Glaciation would have reduced the volume of water in the ocean, storing it as ice.
making the oceans more acidic," Boris Sakschewski ... Man-made chemicals have damaged this shield, causing acid rain, but it has started recovering since a number of these chemicals were banned ...