4 ms·Scrolling back to December of 2019 shows a stark contrast.by ed312 6y agoScrolling back to December of 2019 shows a stark contrast.singlow 6y agoBut what if you scroll back to June of 2019? Not as much difference. Pollution is very seasonal.jeffbee 6y agoSeems pretty different for Los Angeles. https://twitter.com/Jeffinatorator/status/1271189875832680449 https://twitter.com/Jeffinatorator/status/127118987583268044...