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Study finds rising emissions of ozone-depleting CFC-11, banned by Montreal Protocol

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Emissions of one of the chemicals most responsible for the Antarctic ozone hole are on the rise, despite an international treaty that required an end to its production in 2010, a new study by researchers at NOAA and their colleagues shows. —NOAA scientist Stephen Montzka, lead author of the paper.

Ozone 170
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NASA-led study identifies unprecedented depletion of stratospheric ozone layer above Arctic

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A NASA-led study has documented an unprecedented depletion of Earth’s protective ozone layer above the Arctic last winter and spring caused by an unusually prolonged period of extremely low temperatures in the stratosphere. The same ozone-loss processes occur each winter in the Arctic.

Ozone 186
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EPA Climate Change Adaptation Plan sees likely increase in tropospheric ozone, with more difficulty in attaining NAAQS in many areas

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Among the many climate-related vulnerabilities that can impact its mission, the US Environmental Protection Agency (EPA) cites a likely increase in tropospheric ozone pollution as potentially making it more difficult to attain National Ambient Air Quality Standards ( NAAQS ) in many areas with existing ozone problems.

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US EPA to Reconsider National Ozone Standards

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The US Environmental Protection Agency (EPA) will reconsider the 2008 primary and secondary ozone standards. In 2008, EPA established a new primary 8-hour standard for ozone of 0.075 parts per million (ppm), and a new secondary standard set at a form and level identical to the new primary standard. ppm standard, due to rounding.

Ozone 199
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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

Pollution 318
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MIT study: half of US deaths related to air pollution are linked to out-of-state emissions

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They documented a decrease of 30% in 2018 compared to 2005, equivalent to about 30,000 avoided early deaths, or people who did not die early as a result of pollution. a, Source–receptor matrix showing total early deaths per year for 48 × 48 states (right), and its breakdown into PM 2.5 - and ozone-attributable impacts (left).

MIT 307
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Study: 25% EV adoption would save US $17B annually from avoided climate change & pollution damages

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Although the impact of carbon emissions on the climate is well documented, combustion engines also produce other harmful pollutants, such as particulate matter and the precursors to ground-level ozone.