"FRAZEE, MINN. - Don and Norma Smith couldn't understand why their sheep stopped producing lambs in the mid-1990s. When half the animals died mysteriously over one winter, they gave up on the profitable hobby that had won blue ribbons for their kids at the Minnesota State Fair."

"When Alfredo Figueroa stands on the banks of the Colorado River he is reverent out of respect for his tribal heritage yet troubled for future of this overused waterway, which is not only the lifeblood of the Chemehuevi people but also the primary drinking water source for tens of millions of people in the Southwest."

Budget and management problems have wracked the National Children's Study, once the most ambitious effort to document the effects of many factors -- including environmental ones -- on children's health during the entire time they are growing up.

"The troubled United States Enrichment Corp., on the brink of closing a Kentucky enrichment plant, has been bailed out in a complex Energy Department accord designed to keep that facility open one more year."

"Chicago commuters have all the fun. Two weeks ago, there was the Heartland Institute’s Unabomber billboard likening a belief in climate change to psychopathy. This week, those stuck in traffic missed out on one larger-than-life retort to the Heartland campaign but will get to view another."

"The United States on Thursday announced the imposition of antidumping tariffs of more than 31 percent on solar panels from China. The move by the Commerce Department is certain to infuriate Chinese officials already upset after recent bilateral frictions over China’s human rights policies and its increasingly confrontational approach toward American allies like the Philippines and Japan."

"SALMON, Idaho -- The U.S. government is seeking to close caves in national forests in the Northern Rockies to stem the spread of white-nose bat syndrome, a disease that has killed an estimated 5.5 million bats in 19 states and is spreading westward, officials said on Wednesday."

"The number of extreme rainstorms -- deluges that dump 3 inches or more in a day -- doubled in the U.S. Midwest over the last half-century, causing billions of dollars in flood damage in a trend climate advocates link to a rise in greenhouse gas emissions."

"The proportion of Americans with asthma increased from 7.3% in 2001 to 8.4% in 2010, marking the highest level ever, the U.S. Centers for Disease Control and Prevention said Tuesday. In 2010, an estimated 18.7 million adults and 7 million children had the disease -- one in every 12 Americans."