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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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EEA report finds more action needed to protect Europe’s most vulnerable citizens from air pollution, noise and extreme temperatures

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Many regions in Bulgaria, Croatia, Greece, Italy, Portugal and Spain are also characterized by lower incomes and education, higher levels of unemployment and larger elderly populations. In parts of Europe a large number of people are unable to keep their homes adequately warm because of poor-quality housing and the price of energy.

Pollution 265
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Sponsors of SAE Study Conclude HFO-1234yf Can Be Used As Low-GWP Global Replacement Refrigerant in MAC Systems

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HFO-1234yf is a non-Ozone Depleting Substance with a Global Warming Potential (GWP) of 4. As part of the studies, the automotive industry conducted evaluations on a variety of vehicle applications. This new refrigerant is part of a larger platform of low-GWP refrigerants and blowing agents that Honeywell is developing.

Global 186