
Anonymous A. answered 01/09/15
Tutor
4.6
(18)
Results Oriented Tutoring
Good question- and not a simple one to answer. :)
Most vehicles including automobiles, buses, trains and aircraft emit pollution in the form of carbon dioxide, sulfur from diesel burning engines and other particulates. At least with cars and buses, pollution can be measured and modeled by measuring VMT, or vehicle miles traveled based on factors that transportation planners and engineers use. Transit systems, including buses, trains and light rail systems help along with good ridership to reduce emissions and reduce personal vehicle travel. Cars emit the most pollution generally with buses and rail causing the least amount.
Growth patterns of cities through infrastructure to include roads, highways and transit systems greatly affect VMT, i.e., distances from home to work, shopping errands, recreation, etc. Higher population density coupled with the use of transit and integrated mixed uses can also curb pollution. Suburban sprawl and single use zoning increases VMT- increasing the amount of trips being made daily.
Government regulation of emissions from vehicles can greatly help reduce pollution as it does throughout the United States using better technologies for cars like more efficient engines, hybrid technology and implementing fines for those operating poorly maintained vehicles that emit more pollution. Around the world, pollution can vary greatly based on all these factors.