"Federal investigators seeking the cause of a North Side train derailment are taking a close look at the tracks, after early scrutiny of the crew's actions and the train itself revealed no glaring problems."
"A dispute between Canadian pipeline giant Enbridge Inc. and a small Colorado operator is flaring into a political showdown over whether U.S. domestic production will be squeezed out by oil sands crude flowing from across the northern border."
"It's high season in the nation's national parks as millions of visitors come to see nature. If last year's visitor figures hold up -- and early indications suggest they will -- nine million visitors will see the Great Smoky Mountains, the most visited national park. Three other parks -- Grand Canyon (more than four million visitors in 2011) Yellowstone (about three million) and Acadia (more than two million) -- combined will attract roughly the same number."
"WASHINGTON -- Taking aim at California's pioneering efforts to bolster animal safety, the House Agriculture Committee has moved to block states from imposing their own standards for agriculture products on producers from other states."
"WASHINGTON -- A U.S. senator questioned federal environmental health officials at a hearing Thursday about what is being done to address lead poisoning risks posed by contaminated soil around hundreds of old lead factory sites featured in a recent USA TODAY investigation."
"More than 1,000 counties in 26 states are being named natural-disaster areas, the biggest such declaration ever by the U.S. Department of Agriculture, as drought grips the Midwest."
"WASHINGTON -- The worst Midwest drought in a quarter century is doing more damage to U.S. crops than previously expected with the government on Wednesday slashing its estimate for what was supposed to be a record harvest."
"Despite promises from the nuclear industry to regulators and consumers that they learned from mistakes of the past, the nation's first two nuclear reactor projects built from scratch in 30 years are headed toward hundreds of millions of dollars in cost overruns and months, if not years, of delays."
"WASHINGTON, DC -- The same 'man-made' problems underlying last year's nuclear disaster in Japan exist today in the United States, warn five U.S. groups responding to the Fukushima Nuclear Accident Independent Investigation Commission's report to Japan's Diet, or parliament."
"LOS ANGELES -- US nuclear regulators published an update on California's troubled San Onofre power plant Thursday, sparking an expert warning that the problem is more serious than first thought."
