Bipartisan legislation that would extend the biodiesel tax credit by two years was recently introduced in the U.S. House of Representatives.

WASHINGTON — The U.S. Environmental Protection Agency said it wanted to hear what the public thought of its 2018 proposed renewable fuel standard volume minimums, but many of those who came here to comment seemed unhappy with the agency’s plans.

Joining a growing list of cities in California, San Diego announced Oct. 27 that its municipal vehicle fleet will become the largest in the nation to embrace renewable diesel — from street sweepers to refuse packers to fire trucks.

Spot biodiesel prices have jumped at least 10% because of moves in Washington since Nov. 30, when the Obama administration increased consumption targets for the fuel. About three weeks later, Congress reinstated a $1-a-gallon tax credit for blending it.