BBC News – Air pollution levels in most cities and regions around the world are dropping dramatically as the effects of the virus spread, BBC News reported on Thursday. And the trip was almost canceled.

Researchers in New York City told the BBC it was clear that carbon dioxide, which is believed to be a major source of automobiles, was down to 50. Percentage compared to last year's level.

The research group also noted that global travel levels were down about 35% compared to last year.

Edit: Sun Lee