"The debate over who should use the roads and paths of the country's national parks is consistently fraught. In California's Sequoia National Park, unkind words are sometimes exchanged when pack animals with their wide panniers encounter hikers kitted out with the latest R.E.I. gear on the trails behind Mount Whitney. The code of etiquette and safety governing such encounters is sometimes ignored, And there have been continual efforts to ban horses, burros and llamas because of their impact on the trails."

"ANN ARBOR, Mich. -- Michael J. Potter is one of the last little big men left in organic food. More than 40 years ago, Mr. Potter bought into a hippie cafe and 'whole earth' grocery here that has since morphed into a major organic foods producer and wholesaler, Eden Foods."

"In Texas, there is still the drought against which all other droughts are measured: the seven-year dry spell in the 1950s. It was so devastating that agriculture losses exceeded those of the Dust Bowl years, and so momentous that it kicked off the modern era of water planning in Texas."

"It took Gulf Coast lawmakers more than two years of prodding and negotiating to persuade a divided Congress their communities deserve most of the billions of dollars BP will pay in fines for its role in the 2010 oil spill. Now comes another challenge: figuring out how to spend that money."

"VANCOUVER - Seabirds eat everything from twine, candy wrappers and Styrofoam, and their stomach contents show there's been a dramatic increase in plastic pollution off the Pacific Northwest coast in the last four decades, a new study suggests."

"SEATTLE — A unique ice-class barge designed to clean up any oil spills that might result from Shell Alaska’s upcoming operations in the Arctic Ocean has so far failed to acquire final U.S. Coast Guard certification. Engineers from the oil company say it's no longer appropriate to require them to meet the rigorous weather standards originally proposed."

"The debate over making post-Fukushima Daichi improvements to American reactors is getting down into the details, and one focus is pressure relief vents."

Is the coal lobby forging petition signatures on a White House web site to stop EPA from regulating toxic coal ash?

"AUGUSTA, Maine — The Maine Department of Environmental Protection has published a list of 49 chemicals whose everyday use it deems dangerous to the health of Maine children, but an environmental policy group is urging stronger action."

"Lakes across eastern Japan are being contaminated with radioactive cesium from the crippled Fukushima No. 1 nuclear power plant, and scientists are warning of a growing problem in Tokyo Bay.

Radioactive mud carried down rivers is slowly accumulating in the lakes, in some cases making fish and shellfish dangerous to eat.