National (U.S.)

"Baltimore has joined with other major U.S. cities in defending the federal government's authority to impose a 'pollution diet'  on the Chesapeake Bay."

"Nestled into a seaside forest on the University of British Columbia's lands, amid a carpet of sword ferns and salal, sits a gleaming industrial facility that's been hailed as a significant step toward a carbon-neutral future for B.C., Canada and even the world."

"WEST, Texas -- Although the cause of the deadly blast at West Fertilizer Co. remains a mystery, a federal agency on Tuesday said the tragedy was preventable, citing shortcomings in existing regulations and standards at all levels of government."

"The Cowboy and Indian Alliance met Tuesday morning in front of the Capital to kick off a five-day protest against the proposed expansion of the Keystone XL Pipeline."

"None of the tank cars currently in service carrying Bakken crude oil is adequate for carrying that product, a rail industry representative testified Tuesday, but until new federal regulations are completed, the use of inadequate cars will continue."

"Environmental groups are marking the 44th Earth Day on Tuesday with an assault on the Keystone XL pipeline, greenhouse gas emissions and other issues related to climate change."

"The Supreme Court on Monday declined to review a ruling against Exxon Mobil Corp that ordered the company to pay $105 million in damages for polluting New York City's groundwater with a toxic gasoline additive."

Some Republicans in Congress publicly vote with their party to slash land and water conservation funds -- but then quietly ask for some of the money to be spent in their districts.

"The Obama administration finalized $6.5 billion worth of loan guarantees for the country's first U.S. reactors in decades without requiring developers to pay a "credit subsidy fee" -- money that protects taxpayers should the developers default, according to documents obtained by Greenwire."

"A year after the West Fertilizer explosion, the nation is taking its first steps to repair the failed system for preventing chemical accidents. But whether the fixes will work, or even become reality, remains to be seen. Sen. Barbara Boxer, who chairs the Senate environment and public works committee, noted the disaster’s first anniversary with a call for action."