"Federal health authorities on Monday urged pregnant women not to visit a South Florida neighborhood where new cases of the Zika virus have emerged, the first time officials have warned against travel to part of the continental United States due to the outbreak of an infectious disease."

"Beneath the streets of Boston, two robots named Mario and Luigi inspect the flow of human waste, collecting data on city residents."

"Atrazine has been a dirty word among environmentalists for decades. Now state and federal agencies are coming down on the weed killer, amid troubling evidence that it disrupts hormones and contributes to birth defects."

"Emails obtained through public-records requests by a conservation group show that State Toxicologist Ken Rudo forcefully resisted the McCrory administration last year as it moved to alter the do-not-drink letters sent to hundreds of well owners near coal-ash pits owned by Duke Energy."

"The EPA has already spent $100 million to remediate decades of mining."

"The Zika epidemic that has spread from Brazil to the rest of Latin America is now raging in Puerto Rico — and the island’s response is in chaos."

"More criminal charges will be announced Friday in the Flint drinking water investigation, Attorney General Bill Schuette's office announced late Thursday."

"AMBLER, Pa. -- U.S. EPA's Greg Voigt opens a chain-link gate, pushes aside waist-high weeds and scrambles to the highest point in this Philadelphia suburb: a 100-foot pile of industrial waste."

"In the first update to the state’s water quality standards in 24 years, the state moved to allow more toxic substances to enter the water. Environmentalists decry, and businesses support, the proposal."

"Democrats will highlight the Flint, Mich., water crisis during the third night of the Democratic National Convention on Wednesday."