| http://www.w3.org/ns/prov#value | - Pollutants such as carbon dioxide, methane, and other gases last in the atmosphere a long time so they are spread more or less evenly all over the Earth.The big difference between the two hemispheres is the emissions from industry, particularly sulphur dioxide, explained Dr Stern.Sulphur dioxide does not last long in the atmosphere, which means it gathers into clouds and falls back onto the cont
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