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Tighter rules on Colorado oil and gas development struck out at the ballot box in November and at the state Supreme Court in January. Now, Democrats, who control the Legislature, plan to introduce a sweeping bill to redefine the Colorado Oil & Gas Conservation Commission’s mission to emphasize public health and safety.

President Donald Trump resumed his attacks on OPEC, saying the world is too fragile to handle a price hike and urging the cartel to “relax and take it easy.”

WASHINGTON — The trucking industry can serve as a testing ground for vehicle miles traveled programs, according to governors gathered to discuss infrastructure.

The wave of climate policy-centric hearings in the U.S. House of Representatives this month continues.

Oil declined for the first time in more than a week after U.S. government data showed an increase in crude stockpiles and production, and as the commodity tracked moves in the equity market.

The Pipeline and Hazardous Materials Safety Administration has issued a final rule that requires railroads to develop and submit comprehensive oil spill response plans for route segments traveled by high-hazard flammable trains.

The U.S. average retail price of diesel rose 4 cents to $3.006 a gallon, according to the Department of Energy. The price of crude oil climbed into the mid-fifty-dollar range, a three-month high, as international supplies tightened and concerns over a deeper trade war with China lessened.

European Union negotiators agreed to impose caps on carbon dioxide from trucks for the first time, stepping up the fight against climate change with a challenge to manufacturers such as Daimler AG.

The Federal Highway Administration has awarded over $10 million to states that are testing alternative methods to fund highway and bridge projects.

Volkswagen AG plans to save 1 million tons of carbon-dioxide emissions a year by making production of its first electric model carbon neutral, part of an effort to clean up its image in the aftermath of the diesel-cheating scandal.