As you may have seen elsewhere, the coronavirus pandemic is having an impact on air pollution, as countries shut down human and economic activity in an attempt to deal with the outbreak. Take nitrogen dioxide. Tropospheric NO2 density decreased significantly over China between January and February, and the same seems to be happening in northern Italy, which normally has some of the most severe air pollution in Europe. See the ESA’s animation:
More broadly, try this online map, which compares NO2 emissions before and after 20 February 2020 anywhere on the planet. [Maps Mania]
Previously: Mapping Nitrogen Dioxide Pollution.