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PM2.5, O3 pollution associated with development of Alzheimer’s disease; new study identifies evolving axonal damage

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and ozone at or above the current standards have been linked to neuroinflammation and high risk of Alzheimer’s disease (AD). suggesting long-term exposure to PM 2.5 , as well as ozone above the current US EPA standards, are associated with increased risk of Alzheimer’s disease. Exposures to concentrations of PM 2.5 g/m 3 in PM 2.5

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Study finds global rivers and streams emitting 3x IPCC estimates of the GHG N2O

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Scientists report in an open access paper this week in the journal Proceedings of the National Academy of Sciences (PNAS) that river and stream networks are the source of at least 10% of human-caused nitrous oxide emissions to the atmosphere. This new global emission estimate is startling. Beaulieu et al. PNAS doi: 10.1073/pnas.1011464108.

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Study identifies Bakken Formation alone as responsible for ~2% of global ethane emissions

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The Bakken Formation, a shale oil and gas field in North Dakota and Montana, is emitting roughly 2% (about 250,000 tons per year) of the globe’s ethane, according to new study led by researchers at the University of Michigan. Hydrocarbons react with NO x and sunlight to produce ozone. Ground-level ozone leads to poor air quality.

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