• arclein
Experiments in Xi'an and Beijing showed that sulphate can form due to interactions caused by nitrogen dioxide and sulphur dioxide ??" building up tiny droplets of sulphuric acid which can be inhaled.
Lead author Renyi Zhang from Texas A&M University says, 'People have known that sulphate was a big contributor to the fog, and sulfuric acid particles were formed from sulphur dioxide released by coal-burning for residential use and power plants, and other
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