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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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UCL-led study finds climate impact caused by growing space industry needs urgent mitigation

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The rapidly growing space industry may have a greater climate effect than the aviation industry and undo repair to the protective ozone layer if left unregulated, according to a new study led by UCL and published in the journal Earth’s Future as an open-access paper. The space industry is one of the world’s fastest growing sectors.

Climate 428
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Study finds São Paulo switch from ethanol to gasoline dropped local ozone levels by 20%, increased CO and nitric oxide concentrations

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A study by a pair of researchers at Northwestern University found that when fuel prices drove residents of São Paulo, Brazil, to switch from ethanol to gasoline in their flexible-fuel vehicles, local ozone levels dropped 20%. At the same time, nitric oxide and carbon monoxide concentrations tended to go up. 3 , respectively, being 2.7

Ozone 316
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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. and PM 10 ), ozone, nitrogen dioxide, sulfur dioxide and carbon monoxide. nitrogen dioxide (NO?) sulfur dioxide (SO?) Particulate matter (PM 2.5

Pollution 435
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Oregon EQC approves Clean Trucks Rule

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Together, the rules will not only ensure new diesel trucks are as clean as possible, they also put Oregon on a path towards a zero-carbon transportation future. Diesel engines are responsible for approximately 25% of all NO x emissions in the state, a precursor to the formation of ground level ozone.

Oregon 210
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Using Ozone-Generated Bubbles to Remove Oil Sheen and Contaminants from Water

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A University of Utah engineer has developed an inexpensive new method to remove oil sheen by repeatedly pressurizing and depressurizing ozone gas, creating microscopic bubbles that attack the oil so it can be removed by sand filters. The ozone in the bubble attacks certain pollutants because it is a strong oxidant.

Ozone 199
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UK researchers report that alcohols in windshield washer fluid are major unreported source of VOCs emissions from cars, including EVs

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Cars’ average carbon dioxide emissions have dropped by 25% since the early 2000s, according to the US Environmental Protection Agency (EPA), but this gas only accounts for part of the total. —Cliff et al. While some VOCs are released in exhaust, others may arise from an unexpected source—e.g.,

Emissions 397