Acidifying Pollutants, Arctic Haze, and Acidification in the Arctic
The emissions of acidifying compounds, sulfur dioxide (SO2)
and nitrogen oxides (NOx), have increased since pre-industrial
times as fuel combustion, population and industrial activity
have increased worldwide. These pollutants occur in
considerable quantities and cause adverse effects on human
health and the natural environment. Sulfur emissions are
mainly associated with point sources such as power plants,
smelters, pulp and paper mills, and oil and gas processing.
In contrast, nitrogen oxides are derived not only from power
generating stations but also from diffuse emissions, which
are less easy to quantify.
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