"Expectant and breastfeeding mothers should not routinely be screened for high lead levels in their blood, a leading group of U.S. physicians said Monday."

"A national environmental protection organization says that state leaders in Massachusetts lacked a permit and adequate monitoring for the weekend’s aerial spraying of pesticides to combat mosquitoes carrying eastern equine encephalitis."

"When Hadyn Parry, chief executive officer of the British biotechnology company Oxitec Ltd, appeared at a Key West town hall meeting to present his plan to use genetically modified mosquitoes in the fight to eradicate dengue fever, he came up against familiar resistance."

Researchers are studying whether the chytrid fungus -- which has decimated frog and salamander populations around the world -- is being spread among wild amphibians by the release of infected animals bought at pet stores. The fungus has devastated some 200 species globally, and may be responsible for the greatest known disease-caused loss of biodiversity in recorded history.

"Back in the late 1700s, when Baltimoreans got their water from nearby streams, springs and wells, every household was ordered to keep two leather buckets filled to fight fires. That precaution might come in handy again, as the water main break Monday near the Inner Harbor delivered a disruptive reminder to downtown businesses and commuters of just how decrepit the regional system supplying the vital liquid has become."

"WASHINGTON -- After an impasse with a South Carolina senator was broken, the Senate passed a historic bill Wednesday by unanimous consent that would help thousands of sick Marine veterans and their families who were exposed to contaminated water at Marine Corps Base Camp Lejeune, N.C."

"The Environmental Protection Agency announced on Friday afternoon that it would review its new standards for mercury, soot and other emissions for a handful of proposed new coal-burning power plants.

The review will delay the implementation of the regulation for the new plants for at least three months while experts determine whether the emissions limits may safely be relaxed.

"A new smog standard that President Obama withdrew last fall would save thousands of lives each year if implemented, particularly in the Los Angeles region, New York City and Chicago, according to a new study led by Johns Hopkins University scientists."

Does the radio frequency electromagnetic radiation emitted by utility company 'smart meters' cause health problems in some individuals? The answers may not be as clear as utilities often claim.

"HENDERSON, Minn. — Minnesota made headlines around the world in 1995 when schoolchildren discovered dozens of grossly deformed frogs in a pond in south central Minnesota."