"White House Reviews Truck Efficiency Rules"

"The White House Monday started its final review of a proposal to improve the efficiency of large trucks and reduce their greenhouse gas emissions.

The proposal, which the Obama administration started writing last year, would be the second round of efficiency rules for medium- and heavy-duty vehicles, including trucks and buses.

Trucks account for 4 percent of vehicles on the road, but 20 percent of the transportation sector’s carbon dioxide emissions."

Timothy Cama reports for The Hill March 30, 2015.