References
"Air Pollutants and Your Health." Air Pollutants and Your Health. N.p., n.d. Web. 01 May 2014.
"Bakersfield, Calif." - 11 U.S. Cities With the Worst Air Pollution. N.p., n.d. Web. 02 May 2014.
"What Causes Air Pollution? Here Are Some Natural and Human Activities That Cause Pollution." What Causes Air Pollution? Here Are Some Natural and Human Activities That Cause Pollution. N.p., n.d. Web. 29 Apr. 2014.
"What Is Air Pollution?" What Is Air Pollution? N.p., n.d. Web. 02 May 2014.
"Bakersfield, Calif." - 11 U.S. Cities With the Worst Air Pollution. N.p., n.d. Web. 02 May 2014.
"What Causes Air Pollution? Here Are Some Natural and Human Activities That Cause Pollution." What Causes Air Pollution? Here Are Some Natural and Human Activities That Cause Pollution. N.p., n.d. Web. 29 Apr. 2014.
"What Is Air Pollution?" What Is Air Pollution? N.p., n.d. Web. 02 May 2014.