GHG emissions from transportation are a result of fuel consumption, which is affected by three factors, the efficiency of the vehicle, the carbon content of the fuel and the amount of travel activity. Achieving improvements in transport sustainability requires that measures be taken in all three of these areas. Nevertheless, differing circumstances among nations, regions or cities have resulted in a range of best practice examples, some of which concentrate more on one type of factor and less on another. Some strategies are best deployed at the national level, while others are most effective, and indeed, most possible to implement, locally.
Center for Clean Air Policy (CCAP)
Environment & Climate Change
USA and Canada (USC)
United States of America