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Natural-gas engine manufacturer Westport Innovations reported a first-quarter loss on soft market conditions.

The Florida state legislature passed a bill that seeks to encourage natural gas use in vehicles by eliminating decal and licensing programs for natural gas and replacing them with a tax system similar to diesel fuel.

CNG One Source said it acquired Emission Solutions Inc., which makes natural-gas engines for heavy-duty trucks. Terms were not disclosed.

Canadian truckload carrier Bison Transport has begun testing the use of liquefied natural-gas powered trucks, the Canadian Broadcasting Corp. reported.

President Obama again proposed federal tax credits for buyers of trucks powered by natural gas, including such a plan in his newest energy initiative on March 15.

LOUISVILLE, Ky. — Westport Innovations and Clean Energy Fuels Corp. announced a new joint program aimed at further accelerating the adoption of liquefied natural gas vehicles among trucking companies.

President Obama has proposed giving those who buy trucks powered by natural gas a 50% tax credit on the price differential between natural gas and diesel-powered trucks.

Ryder System said Eagle Distributing in Louisiana signed a deal to lease 23 compressed natural gas tractors.

Westport Innovations Inc. said its natural-gas engine sales declined for the fourth quarter but rose 25% for the year on higher North American and international demand.