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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. The week of Chinese New Year holiday is indicated by the red lantern shown inset panels (b) and (h).

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Harvard/Nanjing study: China’s war on PM2.5 pollution is causing more severe ozone pollution

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In early 2013, the Chinese government declared a war on air pollution and began instituting stringent policies to regulate the emissions of PM 2.5. pollution is falling, harmful ground-level ozone pollution is on the rise, especially in large cities. Over the course of five years, PM 2.5 But the rapid reduction of PM 2.5

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Study: ozone levels higher across China than in other countries tracking the air pollutant

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In China, people breathe ozone-laden air two to six times more often than people in the United States, Europe, Japan, or South Korea, according to a new international study published in Environmental Science & Technology Letters. 2017 for one ozone metric. 2017 are included.

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China study connects ozone pollution to cardiovascular health

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Exposure to ozone, long associated with impaired lung function, is also connected to health changes that can cause cardiovascular disease such as heart attack, high blood pressure and stroke, according to a new study of Chinese adults. They monitored indoor and outdoor ozone levels, along with other pollutants.

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New international study finds lab testing of diesel NOx emissions underestimates real-world levels by up to 50%

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Daven Henze, an associate professor of mechanical engineering at CU Boulder, used computer modeling and NASA satellite data to simulate how particulate matter and ozone levels are, and will be, impacted by excess NOx levels in specific locations. The team then computed the impacts on health, crops and climate. —Chris Malley.

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ICCT study finds that transitioning to low-GWP MAC refrigerants in China could avoid up to US$150B in costs

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Among the findings of the report, “HFC-134a phase-out in the Chinese light-duty motor vehicle sector”, was that, considering the social cost of CO 2 e, up to 1 trillion RMB in costs (US$150 billion) required to address climate change could be avoided through 2050 by transitioning to low-GWP alternative MACs. Background.

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