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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.

Ozone 291
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Carnegie study finds climate impact of particulates varies greatly depending on where the pollution originated

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However, aerosols have a much shorter lifespan in the atmosphere than the gases responsible for global warming, resulting in an atmospheric distribution that varies by region, especially in comparison to carbon dioxide. So far, policy discussions have not come to grips with this fact. —Ken Caldeira. This work is part of a larger $1.5-million

Climate 170
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Study measures the effect of regional change in clouds caused by ships’ emissions; masking GHG warming

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This puffy line is not just exhaust from the engine, but a change in the clouds that’s caused by small airborne particles of pollution. Satellite image taken 16 January 2018 off the coast of Europe. Pollution from ships creates lines of clouds that can stretch hundreds of miles. NASA Earth Observatory.

Emissions 223
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EEA report: EVs are better for climate and air quality

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Battery electric cars emit less greenhouse gases and air pollutants over their entire life cycle than petrol and diesel cars, according to a European Environment Agency (EEA) report. Shifting to electric vehicles could also reduce noise pollution, especially in cities where speeds are generally low and traffic often stands still.

Climate 268
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WHO data: global annual PM10 increased by 6% during recent 3-year period; based on data from 851 cities

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population weighted comparisons in annual mean PM 10 for a three?year About half of the urban population being monitored is exposed to air pollution that is at least 2.5 WHO notes that the results for the 851 cities are to be interpreted with caution, as yearly variations due, for example, to climatic changes can be important and 3?year

Global 239
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Fossil Fuels Renewable Energy and EV Modern Life

Setec Powerr

Our principal goal should be to mitigate problems that are global in scale, such as climate change, biodiversity loss, virus transmission, and invasive species. EPA’s regulatory responsibilities expanded during its first two decades, and many forms of pollution were identified and reduced. Environmental Protection Agency (EPA).

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Advanced Turbocharged, Direct Injected Gasoline Engines Poised to Take on Diesels in US and in Europe for Reduced Fuel Consumption and Emissions

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Additionally, suggested one of the speakers, advanced SIDI (spark-ignited, direct-injection) engines can take light-duty market share back from diesels in Europe based on the same trends. However, prior to the remarks on climate change and the regulatory response, he spent a few minutes discussing the efforts on urban pollution—e.g.,

Gasoline 150