New report tackles a pollution puzzle: while other pollutants drop on weekends, smog-causing ozone levels actually increase over the weekend in certain parts of California.
In the Los Angeles area, ozone levels typically are 32 percent higher on Saturdays and Sundays than they are Monday through Friday when freeways are clogged with commuters. The difference is 25percent in San Francisco. The phenomenon in Los Angeles and San Francisco, first noticed in the 1980s, has four possible explanations, according to the report.
Thanks to Abhijeet Chavan
FULL STORY: Report cites several reasons for weekend smog increase
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Economic & Planning Systems, Inc.
UCLA Lewis Center for Regional Policy Studies
Mpact (formerly Rail~Volution)
Chaddick Institute at DePaul University
City of Piedmont, CA
Great Falls Development Authority, Inc.
HUDs Office of Policy Development and Research