"A new report finds the railroad cars that transport the toxic gas around the United States are vulnerable to accidents and sabotage."

"After more than six years of negotiations, the global aviation industry agreed on Monday to the first binding limits on carbon dioxide emissions, tackling the fastest-growing source of greenhouse gas pollution."

"Europe and the United States tried to bridge differences over emissions standards for aircraft on Sunday as global aviation leaders prepared to adopt new rules that could affect Boeing Co and Airbus Group's production of the largest jetliners and freighters."

"Under pressure to devise a fix for its polluting diesel cars, the chief executive of Volkswagen, Matthias Müller, met for the first time with a senior government official in the United States to discuss the crisis that has engulfed the German carmaker since September."

"After the oil industry won a victory by persuading Congress to end a 40-year-old ban on the export of crude, it is far from clear what the impact will be on oil-filled tanker trains traveling through New Jersey."

"The European Parliament has decided to set up a 45-member inquiry committee to investigate breaches of EU rules on car emission tests and alleged failures by EU member states and the European Commission to enforce EU standards."

"A consulting firm that helped write a report underestimating the risks of catastrophic spills from a proposed Vancouver oil train terminal has worked for two groups that will gain financially if the project moves forward."

"Fuel economy is at record highs and carmakers have surpassed strict greenhouse gas emissions standards for the third straight year, according to the Environmental Protection Agency, which released a pair of annual reports about the U.S. fleet of cars and trucks Wednesday."