February 21, 2019
15 year study claims air pollution controls are working
SOUTHLAND – (INT) – State smog fighters say tough clean air programs are working.

A new scientific study using satellite technology provides some evidence that emissions of fine particle pollution throughout the state are diminishing.

Scientists from Emory University, NASA’s Jet Propulsion Laboratory and the California Air Resources Board analyzed satellite data to determine the 15-year trend of fine particle pollution. This type of pollution is also known as PM2.5. It stems from the burning of fossil fuels, diesel soot from motor vehicles, power plant emissions and bushfires. Those are all major sources of fine PM 2.5 particles.

Satellite data was able to identify locations that could be directly linked to programs that reduced measured pollutants.

• Coastal Cities: Concentrations of sulfates in coastal cities decreased significantly, the result of CARB’s 2006 ultra-low sulfur diesel fuel standard, 2007 Drayage Truck Rule, and 2008 Ocean-Going Vessel Fuel Regulation.

• Transportation Corridors in Los Angeles: Concentrations of nitrates in the Los Angeles area decreased significantly, most prominently near transportation corridors, pointing to the success of CARB’s various mobile source NOx control programs.

• Urban and Suburban Southern California: Concentrations of organic carbon (OC) and elemental carbon (EC) decreased significantly in both the urban and suburban areas of Southern California. This is the result of CARB’s programs that clean up cars and trucks, along with other programs including wood burning rules implemented by air districts.

Satellite remote sensing technology can be used to identify air pollution “hotspots”.
Story Date: June 17, 2018
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