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On July 26, 1943, Los Angeles was blanketed by a thick gas that stung people's eyes and blocked out the Sun. Panicked residents believed their city had been attacked using chemical warfare. But the cloud wasn't an act of war. It was smog. So what is this thick gray haze actually made of? And why does it affect some cities and not others? Kim Preshoff details the science behind smog.

California's Old Tires Cross the Ocean and Come Back as Smog

Clearing California Skies California, 1943. The mysterious haze called smog was getting worse - burning eyes, searing throats, literally choking the life out of Californians. The video, Clearing California Skies tells the story of how concerned citizens, top scientists, and local and state government agencies fought back. It took the best science and engineering to control smog forming emissions from factories, shops, incinerators, and the automobile. Despite meteoric population gains, (more factories, more cars, more trucks) - air quality has improved dramatically over the past 50 years, and along the way California emerged as a world leader in the battle against air pollution.

Vice videos can have some foul language. I use this when teaching Air and Water Pollution. This video is somewhat benign in the language department. Video also can be used to discuss developing countries and recycling of minerals.

Part 2. I recently found this site with the same video. Great for Air and Water Pollution.