"Heart attacks dropped by one-third in one county in Minnesota after two smoke-free workplace ordinances went into place, a new study shows."

"Despite sweeping reform of food safety laws intended to make what we eat less dangerous, the number of Americans falling ill or dying from contaminated food has increased 44% since last year, according to a report released Wednesday."

"Researchers say that some chemicals have unexpected and potent effects at very low doses — but regulators aren't convinced."

"Pollution from factories and mines is putting the health of 125 million people at risk worldwide and is as dangerous in the developing world as malaria or tuberculosis, according to a report published on Tuesday by two environmental advocacy groups."

"San Onofre is among the facilities to be studied in the $2-million pilot program conducted by the National Academy of Sciences."

"Scientists say the U.S. biological defense system relied on kits that were far less able to help detect lethal germs than officials thought."

"When it comes to feeding your children organic food, pediatricians have new advice for parents. Organic produce and meat might be worth the hefty price tag, but you can probably skip the organic milk."

"CALGARY -- The ugly scars left on the northern Alberta landscape by the oil sands have prompted calls from around the world for an independent body to gather data on the ecological damage wrought by the energy industry."

"Hundreds of Peruvian farm workers, the majority of them women, became sick after inhaling a pesticide sprayed on a nearby field, the state-run Andina news agency reported."

"Carbon dioxide has been vilified for decades as a driver of global warming. A new study finds signs that CO2, exhaled in every breath, can exert an equally worrisome threat -- impaired cognition -- in nearly every energy-efficient classroom, meeting hall or office space."