Mexico: change in air pollution in Mexico City 2020

From April 26 to May 5, 2020, nitrogen dioxide air pollution levels in the Mexican capital Mexico City decreased by 53 percent when compared to the first ten days of March, the highest reduction reported in the monitoring period. Nitrogen dioxide (NO₂) is a gaseous air pollutant and has a direct connection to fossil fuel emissions. Changes in air pollution levels are related to a reduction in industrial activity and traffic circulation in urban areas, a consequence of lockdown measures enforced globally in an attempt to limit the spread of the coronavirus pandemic. The first case of COVID-19 was reported in Mexico on February 28, while social distancing measures were first implemented on March 20.

自2020年4月26日至5月5日，墨西哥首都墨西哥城的二氧化氮空气污染水平与3月前十天相比下降了53%，这是监测期间所记录的最高降幅。二氧化氮（NO₂）是一种气态空气污染物，与化石燃料排放具有直接关联。空气污染水平的变动与工业活动减少及城市区域交通流动的降低有关，这些变化是全球范围内为限制新冠病毒大流行传播而实施的封锁措施的结果。墨西哥首次报告COVID-19病例是在2月28日，而首次实施社交距离措施则是在3月20日。