"TEXAS CITY, Texas -- More than 50,000 Texas City residents have joined a class-action suit against BP PLC, alleging they got sick in 2010 from a 41-day emissions release from a refinery that was the scene of a deadly explosion."

"Risking an election-year backlash from Republicans, the Obama administration is proposing new air quality standards to lower the amount of soot that can be released into the air.

The move, to be announced Friday, is likely to win support from environmental groups and public health advocates but exposes the president to potential criticism from congressional Republicans and industry officials that the rules are overly strict and could hurt economic growth and cause job losses in political swing states such as Ohio and Pennsylvania.

"After five years of toil, a consortium of several hundred U.S. researchers has released a detailed census of the myriad bacteria, yeasts, viruses and amoebas that live, eat, excrete, reproduce and die in or on us."

"Described in two papers in Nature and a raft of reports in other journals, the data released Wednesday describe microbes of the skin, saliva, nostrils, guts and other areas of 242 adults in tiptop health.

"MOSS POINT, Mississippi -- Too many Moss Point residents are dying from cancer, leaders from a Memphis-based civil rights organization said Tuesday."

"The University of Washington has admonished a prominent surgeon who told lawmakers questionable stories about burned babies while testifying in favor of flame retardants."

"Study finds use of CT scans has nearly tripled in the last 15 years. Such radiation exposure increases the risk of cancer."

"CHARLESTON, W.Va. -- In the weeks before last year's settlement of a major water pollution case, lawyers for Mingo County residents were saying they'd unearthed records indicating Massey Energy tried to cover up the extent of its underground pumping of coal-slurry waste."

"Two First Nations communities devastated by mercury poisoning nearly 50 years ago are still feeling the impacts from the metal toxins in one of their key water supplies, a world-renowned expert suggested."

"Experts are warning that the public dangerously underestimates the health risks linked to smoking cannabis."