"The Obama administration's plan for U.N. climate change talks encountered swift opposition after its release Tuesday, with Republican leaders warning other countries to 'proceed with caution' in negotiations with Washington because any deal could be later undone."

"The Obama administration reaffirmed a 2008 government auction of Arctic drilling rights on Tuesday, delivering a major victory to Shell Oil Co. as it aims to resume exploratory drilling in the Chukchi Sea this summer."

"Royal Dutch Shell will resume drilling off Alaska after suspending operations for two years in the wake of an accident, the special U.S. envoy to the Arctic said on Monday, but gave no details as to when.'

"Fort Collins, Colo., led by a Republican mayor, approves targets to reduce emissions and become carbon neutral by 2050, but hurdles remain."

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

"[Maryland] Attorney General Brian E. Frosh has registered his 'strong opposition' to permitting oil and gas drilling off the Atlantic coast, warning it could harm Maryland's beaches and the Chesapeake Bay.

"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."

"In the frozen far north, in Arctic Quebec, the Inuit have relied on the same nutritious foods culled from the oceans for centuries: beluga whale, fish, seal, and walrus. But some of these traditional foods have become so contaminated with brain-damaging mercury that the IQs of schoolchildren in remote Arctic villages are abnormally low."