While smog continues to affect the life of every person in Los Angeles, the majority of the population knows little about it. The simplest way to explain smog is that it forms in a photochemical reaction which means car-exhaust emissions like nitrogen oxide combine with sunlight to create a pollutant. In a city of millions-like Los Angeles where nearly every person drives a car, smog builds up quickly. In addition to the car-emissions, smog also forms in Los Angeles as a result of the industrial factories. Although Los Angeles now contains few of the (once ubiquitous) industrial plants, the pollution still moves in from neighboring cities. On a daily basis, thousands of grams of nitrogen dioxide still enter the atmosphere. Los Angeles’ geography
