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One moment, please https://precisionchiropracticstl.com/stmap_386b3ki.html levocetirizine montelukast In order to examine exactly how population affects air pollution, the researchers employed satellite observations. This allowed them to directly measure air pollution's dependence on population in four of the planet's major air pollution regions: the United States, Europe, China and India. More specifically, the scientists focused on nitrogen dioxide, or NO2, which is a common pollutant from the burning of fossil fuels. The gas is also a precursor to the formation of near-ground ozone, which can cause respiratory problems and is an issue in many major cities.
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