Environmental Defense FundFrom Environmental Defense FundAll TechnologyClimate Benefit of Natural Gas Trucks Limited if Methane Not Reduced in Overall Fuel Production, Study SaysShifting from diesel fuel to natural gas to power the nation's heavy-duty commercial trucking sector would achieve widely promised climate benefits only if widespread emissions of heat-trapping methane across the natural gas value chain are reduced, according to a new study coauthored by researchers from Environmental Defense Fund (EDF) and published in the journal Environmental Science & Technology.May 27, 2015All LogisticsEnvironmental Impact of Panama Canal Expansion on U.S. Ports Remains UnclearThe current expansion of the Panama Canal, expected to be completed by early 2015, creates tremendous opportunities for the global freight transportation industry and may have significant effects on many ports in the United States, particularly in Houston and other Gulf areas. The environmental implications of the expansion are less clear.January 3, 2013Air CargoFreight Hauling Prime Polluter, Says Environmental Defense Fund Report, Which Calls on Congress to Fund Clean-upMarch 22, 2010Page 1 of 1