Contemporary Coal Power plant

[size=18]Comparison of Growth Areas and Emissions, 1980-2008
The graph shows that between 1980 and 2008, gross domestic product increased 126 percent, vehicle miles traveled increased 91 percent, energy consumption increased 29 percent, and U.S. population grew by 34 percent. During the same time period, total emissions of the six principal air pollutants dropped by 54 percent.
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This will be updated at 2011, since Air pollution Emission changes is updated every 3 years.

Source: 2009 US Greenhouse Gas inventory Report
Taken From: Environmental Protection Agency (US)

The pie chart shown below demonstrates how Carbon is emitted per sector

As we all know USA is a G12 (super power) nation who's power is supplied approximately 50% by the Coal Power Industry. take a look in this site to see the air quality by states..

I wish the same could be done all over the globe, but I guess the means for that isn't available yet.

follow this link!
======= http://www.weather.com/outlook/health/airquality/?state=AL#AL