Expert Shares Advice on Reducing Greenhouse Gases at Border

Environmental experts say the U.S. Mexico border region is ripe for collaboration to reduce green house gases. But they say governments on both sides of the border stand in the way. In our series "A Matter of Degrees: Climate Change in San Diego," we look at energy use on the California Mexico border. KPBS Border Reporter Amy Isackson spoke with SDSU professor Alan Sweedler who has researched and developed energy policy in San Diego for 25 years.

(Photo: San Ysidro Port of Entry. Nathan Gibbs/KPBS )