Account-1:
Account-2:
Scholar:
Date:
Tuesday, February 20, 2018
Retweets:
143 retweets
(Twitter) Likes:
318 likes
Body:
Even our air is getting cleaner. In the United States, for example, aggregate emissions of six common pollutants (i.e., carbon monoxide, lead, nitrogen dioxide, ozone, fine & coarse particulate matter, and sulfur dioxide) fell by 67% between 1980 and 2016.