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Studies find global COVID-19 lockdowns have significantly reduced PM2.5 and NO2 pollution, but ozone up

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Levels of two major air pollutants have been reduced significantly since lockdowns began in response to the COVID-19 pandemic, but a secondary pollutant—ground-level ozone—has increased in China, according to new research. Ozone is harmful to humans at ground-level, causing pulmonary and heart disease. —Guy Brasseur.

Ozone 291
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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. —Ryan et al.

Climate 428
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PSI team develops web tool for consumers to compare environmental impact of passenger cars in detail

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The system will graph lifecycle impact for a range of specified powertrains, for a large number of impact categories: Climate change [kg CO 2 -eq.]. Deterioration of the ozone layer [kg CFC-11-eq.]. The top sample above shows climate change impact; the subsequent chart shows human toxicity. in review).

Mariner 435
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New study puts air-pollution related deaths in India in 2019 at 1.67 million

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It increases future risk for heart disease, diabetes, and respiratory disease for today’s children when they become adults. and that due to ambient ozone pollution increased by 139.2%. The consequences will be long-lasting without efforts to reduce air pollution in the nation of 1.35 It is reducing children’s IQ. since 1990.

Pollution 321
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Study finds warming caused by synthetic greenhouse gases could outweigh climate benefits from phasing down CFCs

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Chlorofluorocarbons (CFCs)—commonly used in refrigerators and air conditioners—play a role in creating a hole in the ozone layer over Antarctica. We infer recent SGHG emissions and examine the impact of future emissions scenarios, with a particular focus on proposals to reduce HFC use under the Montreal Protocol.

Climate 199
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California ARB moves forward with climate and air quality actions

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Actions to promote ZEVs in these applications are important to foster further technology development so they become suitable for broader use in the future. Approximately 70% of the reductions needed to meet the ozone standard in the South Coast in 2031 would come from existing or proposed regulatory actions. emissions by more than 20%.

Climate 199
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Study Finds On-Road Transportation Sector the Greatest Net Contributor to Atmospheric Warming Now and in Mid-Term; Power Sector Takes the Lead by 2050

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Radiative forcing due to perpetual constant year 2000 emissions grouped by sector for 2020 (left) and 2100 (right) showing the contribution from each species. In their analysis, motor vehicles emerged as the greatest net contributor to atmospheric warming now and in the near term, with a total radiative forcing of 199 mWm -2 in 2020.