Shares of Clean Energy Fuels are climbing in early trading on Tuesday after the company announced it has opened two America's Natural Gas Highway stations. Clean Energy said fueling has begun at its stations in Amarillo, Texas and Oklahoma City, Oklahoma. The stations are to support UPS' growing fleet of LNG trucks. The company announced additional truck fueling agreements as well as its award of $2.5 million for the construction of two LCNG stations located in Pennsylvania.
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