remarkable air quality improvement Jan 31, 2015 16:41:37 GMT -8 Brian and anni like this Quote Select PostDeselect PostLink to PostBack to Top Post by Mat's Mom on Jan 31, 2015 16:41:37 GMT -8 There is plenty of bad environmental news. But Los Angeles's "remarkable air quality improvement" is good news. EOS Article "Then and Now: Urbanization and Air Pollution" Does anyone remember the bad old days like Figure 1a?