"U.S. regulators will put new restrictions on the world's most widely used herbicide to help address the rapid expansion of weeds resistant to the chemical, Reuters has learned."

"RENO, Nev. -- Todd McNeal, chief of Twain Harte Fire and Rescue, spoke before his fellow firefighters and foresters last week with the tone of an evangelist. 'There is fundamental change that has occurred around us,' said McNeal, his voice rising to fill a dimly lit casino resort conference hall."

"The surge that's scheduled to hit the American coastline Wednesday isn't coming from a hurricane, but it could still leave a feeling of helplessness in its wake. Flood insurance rates are set to skyrocket when a new bill goes into effect on April 1."

"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.