NO2 air pollution variation during the coronavirus crisis Spain March 2020

The levels of nitrogen dioxide, a pollutant that originates mainly by combustion engines burning fuel, dropped drastically in Spain during the first week of forced confinement which was announced by the Spanish government the 15th of March 2020. As of that day, the level of air pollution in the coastal city of Valencia decreased from 114 to 42, which represented a drop of 64 percent in the level of nitrogene dioxide.

二氧化氮（Nitrogen dioxide）的浓度，一种主要源自燃油燃烧的内燃机排放的污染物，在西班牙政府于2020年3月15日宣布的强制隔离措施实施的第一周内急剧下降。至该日，沿海城市瓦伦西亚的空气污染水平从114降至42，这意味着二氧化氮浓度下降了64个百分点。