Press Release: Scientists find 50-year decline in some Los Angeles vehicle-related pollutants

http://feedproxy.google.com/~r/ClimaterealistsNewsBlog/~3/8F2UO83uXjc/index.php
WASHINGTON—In California's Los Angeles Basin, levels of some vehicle-related air pollutants have decreased by about 98 percent since the 1960s, even as area residents now burn three times as much gasoline and diesel fuel. Between 2002 and 2010 alone, the concentration of air pollutants called volatile organic compounds (VOCs) dropped by half, according to a new study by NOAA scientists and colleagues.