Environmental Implications


  • Air pollution:
    • Cars emit nitrogen oxides, sulphur dioxide, carbon dioxide and monoxide as exhaust resulting in poor air quality.
  • Landscaping:
    • Construction of roads, freeways and tunnels influence the shape of cities and landscapes.


  • Railway construction:
    • Tree feeling and the blasting of rock are involved in making tunnels and subways.
  • Air pollution:
    • Steam trains had a high pollution rate due to a 5-10% efficiency
    • Electric trains cause pollution to be produced in power stations
  • Yet trains still have a smaller impact than cars as it can move much more people at a time with less roadspace required.