Archive Tag: Air Quality


Immense amounts of rainfall in Southern California this year have not only lifted the area out of extreme drought, but also greatly improved air quality. The combination of strong winds, which blow particulates out of the Los Angeles basin, and record amounts of rain, has resulted in significantly lower levels of air pollutants than during drought years. UCLA climate scientist Daniel Swain comments that the clear and calm winter conditions that Read more


Magali Sanchez Hall and her family have lived in this neighborhood in Wilmington for 20 years. Sanchez Hall stands on Sanford Avenue in front of New Hope Baptist Church and a shipping container storage yard near her home on Tuesday afternoon, Jan. 31, 2017.

California’s cap and trade system, a market-based law that allows companies to buy and trade pollution allowances by decreasing their carbon emissions, may be disproportionately polluting communities of color. Ann Carlson, co-director of the Emmett Institute on Climate Change and the Environment at UCLA School of Law, says that worsened air quality in low-income Read more

The Eiffel Tower and The Invalides dome, right, are seen from the Montparnasse Tower, as Paris suffered a pollution spike this week.
Francois Mori/AP

Madeline Brozen of the UCLA Lewis Center and the Institute of Transportation Studies recently commented on Paris’ free public transit day, an effort to counter excessive air pollution by making public transportation free and instituting a driving ban for cars with even-numbered license plates. According to Brozen, the efficacy of this strategy was limited by Paris’ size and its transit systems’ unpreparedness to accommodate drastic increases in ridership. Ultimately, Brozen says, free public transit in large cities may compromise quality of service, thereby discouraging ridership. She cited UCLA’s free transportation program—which increased ridership by 50 percent and reduced traffic—as an instance in which free public transportation worked well on a smaller scale.

Read more at The Christian Science Monitor

Heavy smog shrouds Los Angeles on May 31, 2015.
Heavy smog shrouds Los Angeles on May 31, 2015.

Following a summer characterized by light winds, inversions layers, and high pressure systems—all conditions favoring the production of ozone in the atmosphere—Los Angeles is experiencing its worst smog season in the last six years. Daniel Swain, a climatologist at UCLA, explains how these conditions arose and what the future holds for smog conditions in Southern California.

Read more at KPCC