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WASHINGTON — The United States is enjoying a remarkable abundance of energy choices, much of it due to hydraulic fracturing, or fracking. However, there is a growing legal and regulatory challenge to reduce the production and use of fossil fuels by limiting their extraction and transport, a lobbyist said here in a briefing for an American Trucking Associations committee.

The biggest increase in U.S. gasoline demand in almost 40 years hasn’t been enough to keep storage tanks from filling up.

The U.S. average retail diesel price rose by 6.8 cents to $2.266 a gallon, the highest level this year, the Department of Energy reported after its May 2 survey of fueling stations.

U.S. gasoline demand rose at the fastest annual rate in almost 40 years in February as stronger economic growth and cheap fuel prices spur driving in the world’s biggest oil consumer.

Green fleets today are in a market that is a far cry from a few years ago, when diesel prices were soaring and much cheaper alternative fuels, especially compressed natural gas, seemed on the verge of going mainstream.

TruStar Energy has opened a company-owned public compressed natural gas fueling station in Fort Myers, Florida, as a midpoint between Tampa and Fort Lauderdale for fleets traveling the Interstate 75 corridor.

The U.S. average retail diesel price rose by 3.3 cents following a 3.7-cent increase the prior week.

Federal regulators are intent on publishing the final version of Phase 2 of greenhouse-gas regulations for trucks by August, but recent comments on the proposal show an abundance of disagreement by truck and engine makers, industry and environmental advocates and manufacturers of glider kits.

Eleven states considered raising fuel taxes this year, but none have yet passed legislation, unlike last year, when eight states did.

Pilot Flying J CEO Jimmy Haslam has been ordered by an Alabama judge to appear for a deposition May 11 in the truck-stop chain's rebate fraud case, but a Tennessee paper is reporting that Haslam is fighting his appearance.