The coronavirus crisis has resulted in major drops in pollution across the world. Environmental groups welcome this change. But, some experts warn that pollution is likely to return to levels before the crisis once life returns to normal. Skies have been clearer in cities from New York to Paris to Beijing as governments closed businesses and schools and issued stay-at-home orders. Satellite data shows nitrogen dioxide has dropped about 30 percent in parts of the Northeast United States compared to the previous five years. Nitrogen dioxide is a major form of air pollution. Michelle Manion is an economist with the U.S. based World Resources Institute. On a recent day in Boston, Massachusetts, she noted that the air was so clear that she could read the letters on top of the Prudential building, a well-known city structure.
Define pollution.
low test scores in school children
a substance or thing that has harmful or poisonous effects on the environment
endangered species
political discord and argumentation
What has happened to nitrogen dioxide levels in parts of the Northeast United States?
This article does not mention anything about nitrogen dioxide
There has been no change in nitrogen dioxide levels
Nitrogen dioxide has dropped about 30 percent
Nitrogen dioxide has increased about 30 percent
Nitrogen dioxide is a major form of air pollution.
of vitamin deficiency
of marital discord
of crime in urban areas
of air pollution