Nature: The slow and inexorable increase in the oceans acidity as they soak up carbon dioxide from the atmosphere could itself have an effect on climate and amplify global warming, according to a new study. Acidification would lead certain marine organisms to emit less of the sulphur compounds that help to seed the formation of clouds and so keep the planet cool.
Atmospheric sulphur, most of which comes from the sea, is a check against global warming. Phytoplankton -- photosynthetic microbes that drift...