Some chemical engineers, known as process engineers, specialize in a particular process, such as oxidation (a reaction of oxygen with chemicals to make other chemicals) or polymerization (making plastics and resins).
Quick Answer. Some of the major causes of air pollution include burning of fossil fuels, agricultural activities, exhaust from industries, vehicle fumes, mining operations and indoor pollutants. Air pollution has a negative impact on the environment and life in general.
Decades ago, the United States of America had had the worst emissions and was known to be one of the most obvious examples where we saw air pollution cause global warming in the world. While they have improved, other nations have grown in this area. And caught up.