"A measles-like virus that suppresses the immune system could be the reason an extraordinary number of bottlenose dolphins have died after becoming stranded along the U.S. East Coast, a panel of dolphin experts said on Tuesday."

"An Oakland watchdog group has sued four companies and plans to sue dozens more for allegedly manufacturing or selling shampoos, soaps and other care products without attaching labels warning consumers that they contained high levels of a carcinogen."

"MONTREAL — Quebecers should be worried that it took 15 years for officials to clue into the fact that a Pointe-Claire company had a yard full of toxic materials, says one environmental expert, and the public should be demanding more transparency in the wake of the discovery."

"DETROIT -- Remaining mounds of petroleum coke have been removed from the Detroit riverfront ahead of a city-imposed deadline but more time is needed to haul construction materials away from the sites, according to a storage company."

"Wilma Subra, a diminutive grandmother, has long challenged the corporate polluters in one of the nation's most toxic regions."

"The 53,000 water utilities in the United States deliver some of the safest drinking water in the world — a public health victory of unrivaled success that began in 1908 with chlorination campaigns in Jersey City and Chicago. Still, millions of individual cases of waterborne diseases occur annually and related hospitalization costs approach $1 billion each year. In 2007 and 2008, the most recent years for which figures are available, the Centers for Disease Control and Prevention recorded 164 waterborne disease outbreaks, almost entirely from protozoan cysts of the parasite Cryptosporidium."

"CHARLESTON, W.Va. -- Obama administration officials on Friday proposed to update the federal government's 42-year-old exposure limits for silica dust, a move the Labor Department said would prevent 700 deaths and 1,600 new cases of silicosis every year. The proposal would provide new protections for 2.2 million American workers, cutting in half the legal limit for dust exposure on the job."

"PITTSBURGH -- A project examining the local health impacts from natural gas drilling is providing some of the first preliminary numbers about people who may be affected, and the results challenge the industry position that no one suffers but also suggest the problems may not be as widespread as some critics claim."

"BENTON HARBOR -- While inspecting a house for lead contamination, Steve Weldert came across a child's toy dump truck in a window sill filled with paint chips."

"WATERFLOW — The sickness came in increments, a slow onslaught of weight loss, stomach pain and extreme diarrhea."

"California public health officials suggest limiting hexavalent chromium in drinking water to 10 parts per billion. Environmentalists say that's not nearly strict enough."

"Anti-government activists in Syria are accusing President Bashar al-Assad's forces of deploying a chemical weapons attack on the suburbs of the capital, Damascus. The government denied the attack, but the allegations have prompted the United Nations to call an emergency meeting. Melissa Block talks to Washington Post reporter Loveday Morris for more."

"For nearly a year, disease detectives around the world have been trying to track down the source of a mysterious new virus in the Middle East that has infected 96 people and killed 47 since September."

"The World Health Organization says that at least 135 people in China have been sickened by the H7N9 flu strain, and 44 have died. Most likely, these victims got the virus from chickens sold in live poultry markets. But where did the chickens get it? From ducks, who got it from wild migratory birds, scientists now say."

"U.S. drugmaker Merck & Co said on Friday it is suspending sales of its Zilmax animal feed additive in the United States and Canada following concerns about animals showing signs of distress after use of the product, which is given to cattle to increase their weight before slaughter."