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Study finds changes in the Arctic sea ice cover may be driving changes in atmospheric chemistry

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Bromine then reacts with a gaseous form of mercury, turning it into a pollutant that falls to Earth’s surface. Bromine also can remove ozone from the lowest layer of the atmosphere, the troposphere. Despite ozone’s beneficial role blocking harmful radiation in the stratosphere, ground-level ozone is a harmful pollutant.

Mercury 210
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US and UK researchers report direct measurement of key atmospheric reactant; more rapid formation of secondary aerosols

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succeeded in isolating the simplest CI and reported direct kinetic measurements of its reactions with water, NO, NO 2 , and SO 2. Our results will have a significant impact on our understanding of the oxidizing capacity of the atmosphere and have wide ranging implications for pollution and climate change. Welz et al. Carl Percival.

Ozone 268
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Researchers describe the “where” and “when” of life cycle emissions from gasoline and ethanol in the US

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Researchers from the University of Minnesota have produced a spatially and temporally explicit life cycle inventory (LCI) of air pollutants from gasoline, ethanol derived from corn grain, and ethanol from corn stover for the contiguous US (the lower 48 states). The researchers included a sixth pollutant, ammonia (NH 3 ).

Gasoline 236
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PNNL team finds correlation between reaction mechanism for zeolite SCR catalyst for NOx aftertreatment and bacterial enzyme catalysis

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Although the catalyst is in use, exactly how it converts NO x to nitrogen and water with the help of ammonia (urea) hasn’t been entirely clear. The finding provides insight into how to make better catalytic converters. In some catalytic zeolites, the metal ions can break down the pollutant nitric oxide in vehicle emissions.

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COVID-19 Forced Us All to Experiment. What Have We Learned?

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As economists and social scientists, we draw two fundamental insights from these examples of forced experimentation. He convinced the authorities to remove the handle from the pump of a particular water source that had been implicated in the spread of the disease, thereby halting that spread. military bases.

Chad 98