NASA maps show the effect of a quarantine on air pollution

NASA maps show the effect of a quarantine on air pollution"This is the first time I have seen such a dramatic drop-off over such a wide area for a specific event," said NASA air quality researcher Fei Liu. She made that statement after NASA's Earth Observatory released maps showing a dramatic drop in air pollution in the Wuhan region. Industrial output in the region would have already been down significantly due to the Lunar New Year. However, a government quarantine designed to stop the spread of the coronavirus disease COVID-19 made pollution drop much more significantly and for a longer period.