"Some of the world's biggest fertilizer companies are banking that the aftermath of the worst U.S. drought in 56 years will boost sales, as U.S. farmers seek to cash in on high crop prices."

"A study finds young whites with high levels of exposure to bisphenol A are more likely to be obese. For other ethnic groups, the link is weak."

"Chlorine has long been the industry standard to keep pool water clean and clear, but consumer demand for alternatives has prompted the emergence of new technologies, including the saltwater systems that came into vogue a few years ago and the copper-and-silver ionization and ozone-gas systems that are increasingly popular."

"Canada dropped its longtime opposition on Friday to the international listing of asbestos as a hazardous material, a designation intended to curb the use abroad of the fire-resistant substance, which can cause cancer and other illnesses."

"AUSTIN -- Exxon Mobil Corp. has reported inadvertent emissions of large amounts of pollutants at its flagship refinery near Houston."

"The Portland City Council voted 5-0 during a raucous public meeting Wednesday morning to add fluoride to Portland's drinking water, ending the city's status as the only major U.S. city that hasn't approved fluoridation."

"A U.S. farmer group on Tuesday dropped its opposition to efforts by Dow AgroSciences to roll out a new biotech crop system in exchange for some concessions by Dow, including help investigating any accidental crop damage."

"CHICAGO -- For two decades, one of the most commonly used type of rail tanker has been allowed to haul hazardous liquids from coast to coast even though transportation officials were aware of a dangerous design flaw that almost guarantees the car will tear open in an accident, potentially spilling cargo that could catch fire, explode or contaminate the environment."

Eleven years after the 9/11 terrorism attack, Department of Homeland Security officials explained to a House Energy subcommittee why their program to harden security at U.S. chemical plants still hasn't been implemented.