The transport sector is a source of significant carbon emissions. While individual transportation has yet to become a target area for emissions reduction, mass transportation systems have the potential to replace part of the individual transport and thereby reduce emissions. In busses, trains, metros and even in cable cars different initiatives are introduced, either for more efficient operation or for recovery of brake energy.
Shifting from fossil based diesel to biodiesel is a relatively simple technology. Ethanol is an alternative that may be added both to diesel and petrol, and some countries such as Brazil, in particular, have extensive experience with ethanol fuel for transportation. Biofuels are often seen as competition to food production, which is why second generation technology employing enzymes to extract sugar from agricultural waste is being developed.
CDM projects succeed under the following two main areas of activity:
- Public Transportation
- Alternative Fuels Public Transportation