National (U.S.)

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

"Dolphins are dying in unusually high numbers. Sea turtle nests are declining. Tuna are developing abnormally. And pelicans and gulls are still suffering from the lasting effects of a massive oil spill in the Gulf of Mexico five years ago, the National Wildlife Federation warned in a report released Monday."

"The Obama administration is sending a six year, $478 billion highway bill to Congress with lawmakers struggling to beat a May 31 deadline to renew federal infrastructure spending."

"A new poll finds an overwhelming majority of Americans support an international agreement to cut planet-warming emissions."

"A massive die-off of pine trees in the southern Sierra Nevada caused by beetles attacking drought-stressed trees is turning forests brown and creating a fire tinderbox."

"In a highly anticipated announcement, the United States will offer a roughly 28 percent emissions cut as its contribution to a major global climate treaty nearing the final stages of negotiation, according to people briefed on the White House's plans."

"An anticipated cascade of litigation targeting the Obama administration's new drilling rule gained speed yesterday as a Wyoming lawsuit became the second legal challenge on court dockets so far."

"Sens. Rob Portman (R-Ohio) and Jeanne Shaheen (D-N.H.) squeaked in a vote early Friday morning on their energy efficiency bill after the Senate ended an hours-long marathon on the budget."

"The Obama administration is taking fresh aim at antibiotic-resistant superbugs, a growing cadre of microscopic foes that threatens to undermine public health and economic security throughout the world."

"If a new rule takes effect, about 95 percent of all pipelines would be subject to stricter safety testing because of their age, location and other factors."