This week we are learning about the many substances that can and are polluting the atmosphere. When considering the sources of these pollutants none of us have to look very far as we all likely contribute to the pollutant load on a daily basis. The 1970 Clean Air Act regulated only a handful of pollutants. Why do you think only these criteria pollutants were regulated? Identify two activities you engaged in this week that created criteria pollutants. What pollutants did these activities create? What are some of the health concerns associated with these pollutants? What can you do to reduce your pollutant load?