"Shell may have moved an oil rig that ran aground off Alaska last week partly to avoid millions of dollars in taxes, U.S. Rep. Ed Markey said, raising even more questions about the oil company's decision on the timing of the move."

"A storm moving up the Mississippi River valley will help replenish the river, low in parts from drought, and ease concerns that shipping could be halted along a shallow stretch from St. Louis to Cairo, Illinois."

"BEIJING — One Friday more than two years ago, an air-quality monitoring device atop the United States Embassy in Beijing recorded data so horrifying that someone in the embassy called the level of pollution 'Crazy Bad' in an infamous Twitter post. That day the Air Quality Index, which uses standards set by the United States Environmental Protection Agency, had crept above 500, which was supposed to be the top of the scale."

"Lifeboats from an oil rig that was temporarily grounded on a small island in southern Alaska may have leaked as much as 272 gallons of diesel fuel into pristine waters along the shoreline, but that cannot be determined until a full inspection is completed, U.S. Coast Guard officials said."

"The government declared much of the central and southern Wheat Belt a natural disaster area on Wednesday due to persistent drought that imperils this year's winter wheat harvest."

"The drought that ravaged U.S. corn and soybean crops and spurred record prices may persist, threatening a recovery in production this year that’s needed to bolster global inventories, according to forecasters."

"ANCHORAGE -- As response teams continued Tuesday to evaluate Royal Dutch Shell's once-grounded oil drilling rig, the Coast Guard, the Obama administration and U.S. Sen. Mark Begich all announced investigations or reviews taking a close look at Shell":

"Tug boats tow 28-tonne Kulluk to nearby Kiliuda Bay where the damage can be assessed after grounding on Alaskan coast."

"A new commission formed by Gov. Andrew M. Cuomo, charged with figuring out how New York should adapt in the long term to cope with worsening storms amid climate change and population growth, has recommended an extensive menu of programs: it includes turning some of the state’s industrial shoreline back into oyster beds, hardening the electric and natural gas systems, and improving the scope and availability of insurance coverage, according to a draft version obtained by The New York Times."

"WASHINGTON -- President Barack Obama has signed into law a $9.7 billion bill to pay flood insurance claims from Superstorm Sandy."