"NASA, the agency best known for exploring space, is trying to answer some urgent questions about air pollution right here on Earth."

"Pine Tree facility in the Tehachapi Mountains faces scrutiny over the deaths of at least six golden eagles, which are protected under federal law. Prosecution would be a major blow to the booming industry."

"Partisan bickering erupted in the Senate [Tuesday] over how quickly the federal government should implement a dozen safety recommendations to ensure 104 nuclear plants in the United States are operating safely."

"Congress' debt deal leaves climate advocates grappling with a decade of potentially declining environmental budgets and narrowing hopes of attaching a tax on greenhouse gas emissions to pay down the deficit."

"Federal officials said on Tuesday that they were investigating an apparent link between ground turkey meat and a nationwide outbreak of salmonella illness that has so far killed one person in California and sickened at least 76 more people in 26 states."

"It's official: July was a scorcher. High temperatures in communities across the USA broke or tied records 2,676 times, almost double the number (1,444) of a year ago, the National Weather Service reports."

"U.S. researchers have discovered a genetic mutation unique to African Americans that could help explain why blacks are so susceptible to asthma."

"More than 15 years after a fertilizer bomb was used to blow up a government building in Oklahoma City, killing 168 people, the federal government is proposing to regulate the sale and transfer of the chemical ammonium nitrate."

"The U.S. Army Corps of Engineers is concerned that hydraulic fracturing of natural-gas wells near its dams — such as the one at Joe Pool Lake in southwestern Dallas County — could threaten dam safety."

"The Republican-led House has voted to 'stop,' 'block' or 'undermine' efforts to protect the environment 110 times since taking over the majority in January, two senior Democrats said last week."