"New U.S. solar installations nearly doubled last year, but slowing demand for both residential and large-scale systems, falling panel prices and concerns about looming federal tax reform are still dampening investor appetite for the sector."

"The nation's roads, bridges, airports, water and transit systems are in pretty bad shape, according to the civil engineers who plan and design such infrastructure."

"Federal regulators have given oil and gas operator Hilcorp until May 1 to permanently repair a pipeline spewing more than 200,000 cubic feet of gas a day into Alaska's Cook Inlet or shut it down, citing public safety and environmental risks. The line has been leaking since late December, the regulator disclosed, longer than reported by the company."

"A new White House proposal would slash the Environmental Protection Agency’s budget by 24 percent and eliminate 38 of its programs. One of the programs on the kill list is the Energy Star program, an initiative that experts say is as much about saving money as it is about saving the climate. Should it be eliminated, they argue, both consumers and businesses could suffer."

"The White House is seeking to cut hundreds of millions of dollars from the budget of an Energy Department division that has funded technological research in projects ranging from the LED light bulb to plug-in electric trucks, according to people familiar with the plans."

"President Trump promised to roll back fuel economy rules put in place by the Obama administration. It could take years to play out. What's at stake in the near term: the future of the electric car."

"A federal judge has denied a request by the Standing Rock Sioux and Cheyenne River tribes to halt construction of the final piece of the Dakota Access Pipeline."

"U.S. Senate Minority Leader Chuck Schumer and 11 other Democrats said on Tuesday it was "critical" that the Trump administration leave in place new vehicle fuel efficiency rules, saying the higher standards were achievable."

"The company whose pipeline dumped more than 46,000 gallons of diesel on northern Iowa farmland in January has had more spills than any other pipeline operator in the state over the past 16 years, according to a Des Moines Register analysis."