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Legislation that would reauthorize a grant program meant to improve air quality by reducing diesel emissions was advanced by the U.S. House of Representatives on Sept. 9.

The U.S. average retail price of diesel dropped 0.5 cent to $2.971 per gallon, the Department of Energy reported Sept. 9.

Republican leaders in Michigan’s Senate and House of Representatives are prepared to proceed with a budget, albeit one that doesn’t include a deal to secure funding for the state’s crumbling roads.

Natural gas-fired power plants, which have crushed the economics of coal, are on the path to being undercut themselves by renewable power and big batteries, a study found.

Top administration officials have developed plans to give a 5% boost to U.S. renewable fuel-blending quotas in 2020, as President Donald Trump seeks to temper farm-state criticism he has undermined U.S. mandates compelling the use of corn-based ethanol and soybean-based biodiesel.

Indonesia said it conducted the world’s longest road test using diesel blended with 30% palm oil, and the results showed that the biofuel is safe for cars.

Federal lawmakers and industry proponents are divided over how much funding should be dedicated to a federal program to reduce emissions and improve clean diesel technology.

Trucking executives fear sharp hikes in the cost of diesel, and perhaps a shortage, as the industry competes for fuel with ocean carriers, which have a mandate to sharply reduce pollution in fewer than 90 days.