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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. For comparison, columns over the same time periods are shown for 2019. —Jenny Stavrakou.

Ozone 291
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Study finds rising temperatures increase risk of unhealthy ozone levels absent sharp cuts in precursors

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Ozone pollution across the continental United States will become far more difficult to keep in check as temperatures rise, according to new work led by the National Center for Atmospheric Research (NCAR). Preliminary global mean CO 2 concentrations in February 2014 were 398.06 Ozone formation. Scenario A2 and RCP 8.5.

Ozone 199
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Renault makes public its lifecycle study of Fluence ICE vs Fluence EV

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Renault’s comparison of the carbon footprint of EV and ICE vehicles over production, operation and end of life. The publication gives the opportunity for an “apples-to-apples” comparison between the environmental impacts of the two types of powertrains: same manufacturer, same model, same boundary conditions. Emission standard.

Li-ion 364
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GISS study finds applying stricter non-CO2 vehicle emission standards worldwide would yield climate benefits in addition to major health and agricultural benefits

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Climate response to non-CO 2 vehicle emissions. Global and regional zonal mean temperature changes relative to 2010 due to non-CO 2. vehicle emissions under the baseline scenario (a) and the difference between the tight-standard and baseline scenarios (b). Impacts of worldwide vehicle emissions in 2030 compared with 2000.

Climate 231
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ICCT finds growth in shipping in Arctic could increase pollutant emissions 150-600% by 2025 with current fuels

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Comparison of the potential reduction in emissions with the application of lower sulfur 0.5% While that report projected vessel activity, it did not explore the environmental impacts of increased shipping in terms of air emissions or the potential climate impacts from increases in short-lived climate pollutants such as black carbon.

Pollution 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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positive or negative—and magnitude of net climate forcing from BC emissions), currently available scientific and technical information provides a strong foundation for making mitigation decisions to achieve lasting benefits for public health, the environment, and climate. emissions in 2005. Earlier post.). Source: EPA.

Congress 252
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HEI: 95%+ of world’s population live in areas of unhealthy air

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Seven billion people, more than 95% of the world’s population, lived in areas exceeding the WHO Guideline for healthy air in 2016, according to a new global study. Comparison of 2016 annual average PM 2.5 State of Global Air 2018. Population-weighted seasonal average ozone concentrations in 2016. State of Global Air 2018.

Pollution 218