Smog is one of the most widely known forms of air pollution. Smog is created when large amounts of coal burning and vehicular/industrial emissions are generated in a concentrated area. Some large cities such as Los Angeles and Mexico City have large problems with smog because they are large industrial centers. Recently regulations have been enacted to help reduce smog.
Global warming is the increase in the average temperature of the Earth's surface air and oceans since the mid-20th century. The Earth temperature has risen .74 degrees celcuis in the last century. A big contributer to global warming is the burning of fossil fuels and deforestization caused by mankind. In the last twenty years there has been a big push to stop global warming but this is much easier said then done.
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