Environmental Pollution Scenario: Review and Summary

Although cities contribute to both waste and global warming because of population density and the demands of urban life, they also offer the potential to conserve energy in terms of transportation costs, in comparison to suburban and rural areas. The compact nature of cities makes alternative transportation such as buses, subways, walking, jogging, and bicycle use a feasible alternative to using cars. Regarding the effectiveness of public transportation, in terms of mitigating the effects of global warming it is estimated that "public transit reduces carbon monoxide emissions by nearly 745,000 tons annually. This equals nearly 75% of the carbon monoxide emissions by all chemical manufacturers in the United States" (How public transportation helps the environment, 2014). Public transportation also reduces smog-generating pollutants by 100,000 tons per year (How public transportation helps the environment, 2014).

Finally, using public transportation reduces U.S. dependency on oil in...
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