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Suppliers of fuel-saving technologies for trucks and trailers said they expect their products will increasingly be installed at the factory level under the federal government’s proposed Phase 2 greenhouse-gas standards.

Rep. Tom Rice (R-S.C.) introduced legislation that would raise federal fuel taxes by 10.1 cents per gallon, and index the new rate to inflation as a way to ensure the long-term solvency of the Highway Trust Fund.

The Department of Energy lowered its 2015 forecast for U.S. diesel prices 2 cents to $2.86 a gallon but held its 2016 projection at $3.03.

WASHINGTON — The Environmental Protection Agency and the Obama administration as a whole will continue to emphasize their campaign against climate change from carbon emissions, even if all aspects of useful technologies are not known at present.

The national average price of diesel declined 1.1 cents to $2.832 per gallon, marking its sixth consecutive weekly decrease, the Department of Energy reported July 6.

HOUSTON — BP will pay up to $18.7 billion in penalties to the U.S. government and five states to resolve nearly all claims from its deadly Gulf of Mexico oil spill five years ago in the largest corporate settlement in U.S. history.

The starting point for limiting diesel emissions can be traced to a provision in a bill reauthorizing and expanding the Clean Air Act of 1977 that was signed into law by President George H.W. Bush in 1990.

The U.S. Environmental Protection Agency is aiming to put more ethanol in gasoline even as it reduced the consumption target established in a 2007 energy law, an EPA official said.

The Obama administration didn’t adequately consider the billions of dollars in costs before issuing a rule designed to cut hazardous emissions from 460 coal-fired power plants, the U.S. Supreme Court ruled.