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Study finds COVID-19 lockdown in China brought only slight reduction in PM2.5 and ozone

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Large improvements of air quality in China during the lockdown have been widely reported, but new research shows that two pollutants harmful to human health—fine particulate matter (PM 2.5 ) and ozone—were only slightly reduced. and ozone were only slightly reduced or barely affected.

Ozone 243
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WHO issues new, lower Global Air Quality Guidelines for classical pollutants

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When action is taken on these classical pollutants—particulate matter (PM), ozone (O?), and carbon monoxide (CO)—it also has an impact on other damaging pollutants. can even enter the bloodstream, primarily resulting in cardiovascular and respiratory impacts, and also affecting other organs. nitrogen dioxide (NO?)

Pollution 435
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Fast action on black carbon, ozone and methane could help limit global temperature rise to 2 degrees C

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Fast action on pollutants such as black carbon, ground-level ozone and methane may help limit near term global temperature rise and significantly increase the chances of keeping temperature rise below 2 °C (3.6 °F)—and The climate change benefit is estimated for a given year (2050) and human health and crop benefits are.

Ozone 218
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HEI launches two new non-tailpipe particulate emission studies

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Other public and private organizations periodically support special projects or certain research programs. These include carbon monoxide, ozone, particulate matter, and nitrogen oxides, which are regulated in the United States by the National Ambient Air Quality Standards (NAAQS).

Emissions 353
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Study uncovers role of longer-chain unburned hydrocarbon emissions from diesels in London air pollution; calls for regulatory shift

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The study found that 60% of the winter primary hydrocarbon hydroxyl radical reactivity in London is from those diesel-related hydrocarbons; the authors predicted that the longer-chain HCs contribute up to 50 % of the ozone production potential in London. —Dunmore et al. Dunmore et al. Dunmore et al.

London 150
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EPA report to Congress finds a strong scientific and technical foundation for mitigating black carbon emissions

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The US Environmental Protection Agency (EPA) has submitted its final Report to Congress on Black Carbon , in response to an October 2009 request from Congress to advance efforts to understand the role of black carbon (BC) in climate change. —Report to Congress on Black Carbon. Source: EPA. Click to enlarge. Earlier post.).

Congress 252
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Test of Planet-Cooling Scheme Could Start in 2022

Cars That Think

Up there, 10 to 50 kilometers above the Earth’s surface, ozone molecules absorb the sun’s ultraviolet light, protecting life far below. Eventually, they’ll add equipment to spray tiny aerosol particles of calcium carbonate, the compound found in limestone, blackboard chalk, and Tums antacids.

Ozone 119