10 Possible Transportation Pollution Solutions | HowStuffWorks
Investing in public transit is a climate imperative | The Hill
Transportation Choices: Ranking the Cleanest Ways to Travel
Crafting strong, integrated policy mixes for deep CO2 mitigation in road transport | Nature Climate Change
4.2 – Transportation and the Environment | The Geography of Transport Systems
London Says Air Pollution Fell By Roughly A Third After New Emissions Rules | WAMU
Benefits of Sustainable Transportation | Environmental Center | University of Colorado Boulder
Sustainable transport - Wikipedia
Five cities tackling air pollution
Several Virginia districts receive federal funds to replace diesel buses with less-polluting vehicles | American School & University
Emerging practices in Low Emission Zones throughout Europe | Mass Transit
Maricopa Air on Twitter: "#CommitToOneDay and help reduce air pollution by driving less. The Travel Reduction Program at MCAQD encourages residents to use alternative modes of transportation to help reduce air pollution.
The main sources of air pollution - Breeze Technologies
Delivery Vehicles Increasingly Choke Cities with Pollution - Scientific American
Transportation Choices: Ranking the Cleanest Ways to Travel
Clean + Just Transportation Archives - Transportation Choices Coalition
Even Low Levels of Air Pollution Could Be Bad for Mental Health | MedPage Today
African cities turn to 'green' buses in fight against pollution
Overview of Air Pollution from Transportation | Transportation, Air Pollution, and Climate Change | US EPA