"Arctic sea ice this summer melted to a record low extent or will come a close second, two different research institutes said on Tuesday, confirming a trend which could yield an ice-free summer within a decade."

"Now that it has scrapped a plan to further tighten the smog limits set by U.S. EPA under President George W. Bush, the Obama administration has told a federal court that it has no problem with reopening the litigation over that standard in court."

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"This week marks two anniversaries of global green campaigning groups that could scarcely be more different, while holding almost identical aims."

"SAN FRANCISCO — One of the deepest fears sweeping a shattered nation following the Sept. 11 attacks was that terrorists might poison the country's food."

"Citing state sovereignty and economic hardship, Republican lawmakers said Tuesday that they wanted to give Congress the authority to veto presidents' national monument designations, a power used by nearly every executive since Theodore Roosevelt."

"A leak from a shallow water crude oil pipeline in the Main Pass Area of the Gulf of Mexico has led Chevron to shut down its offshore Louisiana Main Pass pipeline network, the company said on Tuesday."

"Central Basin Water District pays for positive stories by a firm that Google considers a news site. Officials call it innovation, but open government advocates fear it blurs the line between news and publicity."

"U.S. coal companies have pumped $1.5 million into House Speaker John Boehner's political operation this year, a sign of the industry's beefed-up efforts to fight new and proposed regulations from the Obama administration."

"Two weeks after the bankruptcy of a solar company that got $527 million in government loans, the House Energy and Commerce Committee will hold a hearing on Wednesday to explore what went wrong."