"Hyperloop plans revealed Monday envision a 'fifth mode of transport' in which passengers travel at extreme speeds through tubes to reach their destination. Elon Musk, chief executive of Tesla Motors and SpaceX, says the idea is 'extremely speculative.' But if Elon Musk's hyperloop is ever built, it could revolutionize transportation and energy."

"Americans can expect more major power outages because of severe weather driven by climate change, a federal report says."

"Crude oil shipped by railroad from North Dakota is drawing fresh scrutiny from regulators concerned that the cargo is adding environmental and safety hazards, something that analysts say could raise costs."

"Britain's Prime Minister David Cameron has given his unequivocal backing to the divisive 'fracking' process used to extract shale gas from rocks, risking angering his party's supporters from more rural areas."

"MEXICO CITY — President Enrique Peña Nieto of Mexico on Monday, pushing one of the most sweeping economic overhauls here in the past two decades, proposed opening his country’s historically closed energy industry to foreign investment."

"MARSHALL, Mich. — As the Obama administration inches closer to a decision on whether to approve construction of the much-debated Keystone XL pipeline, costly cleanup efforts in two communities stricken by oil spills portend the potential hazards of transporting heavy Canadian crude."

"The Federal Railroad Administration said it is investigating the safety of transporting crude oil by rail, including whether chemicals used in hydraulic fracturing are corroding tank cars."

"MAYFLOWER, Ark. -- In the week after an oil spill strangled the air in Ann Jarrell's neighborhood, tens of thousands of her bees either died or went mad."

"WASHINGTON — As part of the climate change agenda he unveiled this year, President Obama made a commitment to significantly reduce the federal government’s dependence on fossil fuels. The government, he said in a speech in June at Georgetown University, 'must lead by example.' But just two miles from the White House stands the Capitol Power Plant, the largest single source of carbon emissions in the nation’s capital and a concrete example of the government’s inability to green its own turf."

"A year ago, the Fish and Wildlife Service was poised to use a scientifically flawed range map for the American burying beetle during a preliminary assessment of the Keystone XL pipeline's effect on the endangered insect."