Duncan and-chang-1970
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The document discusses the results of a study on the impact of COVID-19 lockdowns on air pollution. Researchers analyzed satellite data from NASA and the European Space Agency and found that nitrogen dioxide levels decreased significantly during lockdown periods in major cities across the world as traffic and industrial activities reduced. Overall, the temporary improvements in air quality during widespread lockdowns highlight the human-caused nature of poor air quality but also show how collective changes in behavior can positively impact the environment.
