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erisman, j. w. and schaap, m.: the need for ammonia abatement with respect to secondary pm reductions in europe, environ. pollut., 129, 159–163

Sagot :

PM 2.5 in Europe is at least 50% secondary particulate matter (PM).

What do you mean by ammonia?

With the chemical formula NH3, ammonia is a nitrogen and hydrogen combination. Ammonia, the simplest pnictogen hydride and a stable binary hydride, is a colourless gas with a strong, pungent odour. It contributes considerably to the nutritional demands of terrestrial creatures by serving as a precursor to 45 per cent of the world's food and fertilisers. Biologically, it is a common nitrogenous waste, especially among aquatic animals. About 70% of ammonia is used to create fertilisers, including urea and diammonium phosphate, in a variety of shapes and compositions. Additionally, pure ammonia is sprayed straight onto the ground. About 40% of the nitrogen in people is thought to have originated from the manufacturing of industrial ammonia.

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