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WASHINGTON — Work will begin immediately to develop a second round of fuel-performance standards for heavy trucks starting in model year 2019, an Environmental Protection Agency official said Wednesday.

The House passed a bill that would take the permitting authority for the Keystone XL Pipeline away from President Obama.

The California Air Resources Board is hosting free classes on complying with CARB diesel regulations.

ESW CleanTech has acquired the assets and product line of Cleaire Advanced Emissions Controls.

The U.S. trade deficit shrank by 11% in March as imports fell by the most in four years, the Commerce Department said Thursday.

Vermont’s Senate cut back on a planned gasoline tax increase passed by the House, but proposed raising the state’s diesel tax, the Associated Press reported.

The Alaska State Legislature has passed a bill authorizing up to $275 million for the development, construction and maintenance of a liquefied natural gas plant and distribution system in the state, the Associated Press reported.

The U.S. trade deficit shrank by 3.4% in February, as demand for imported crude oil fell, the Commerce Department said Friday.

Sales of all diesel retrofit devices in the United States declined in 2012 for the fourth consecutive year, according to the Manufacturers of Emission Controls Association.