Groups plan to spotlight the Keystone pipeline on the 44th Earth Day.
More than 190 countries on Tuesday will mark the 44th Earth Day celebration.
A federal judge has blocked enforcement of a Minnesota law that would ban electricity from new coal plants in the state, even if the power is brought in from other states.
Spokesman Jay Carney blamed Congress for injecting politics into the pipeline debate.
Green groups, farmers and American Indians from areas where the Keystone XL pipeline is planned to run will protest the project in Washington this week.
The committee's request for documents by May 5 comes after an inspector general report earlier this month.
EPA head Gina McCarthy will visit five states on the tour.
Ethanol made from the waste left after harvesting corn is worse for the environment than gasoline in the short term, according to a new study that contradicts the Environmental Protection Agency (EPA).
The solar array will provide about 25 percent of Fort Huachuca’s electricity needs.
Sen. Chuck Grassley (R-Iowa) wonders if the Obama administration could force farmers to use expensive equipment to break down methane.