Because evidence that shows that diesel fumes are more toxic than was previously thought, there has been increased interest in the use of natural gas for vehicles operating in cities. Transit buses, traditionally fueled by diesel, are one of the cheapest forms of mass transit. They are also significant polluters and typically operate in heavily congested urban areas, where significant air pollution problems exist. The report provides an overview of the issues that must be considered when evaluating natural gas an alternative to diesel for use in transit buses.Conversion of Mercedes buses to NG in Brazil is reported ... By 2004, on-board diagnostic (OBD) monitors will have to be active on all fuels in the United States. ... In 2005, European OBD compliance will be required on alternative fuels. ... CRTTM Particulate Filter at New York City Transit, http://www.epa.gov/OMS/ retrofit/documents/ ny_crt_presentation.pdf. that the fuel itself (that is, whether liquid or gas)anbsp;...
|Publisher||:||World Bank Publications - 2001-01-01|