"Shortly after Chicago Public Schools disclosed the district has not tested water fountains for lead contamination, Mayor Rahm Emanuel said the nation's third-largest school system will begin checking water in a small number of schools this year. The announcement Wednesday came more than a month after the Tribune requested the results of any water quality tests conducted by or for CPS since 2012."

"President Barack Obama is planning to visit Flint on May 4 to spotlight the city’s lead-contaminated water that has deprived the city’s 100,000 residents of reliable access to drinking and bathing water."

"DHAKA - On the streets of this South Asian mega-city, jammed solid with rickshaws, honking taxi vans, cars, bicycles, sweating pedestrians and lumbering buses with their paint scraped off in tight squeezes, getting anywhere quickly by road is impossible."

"Cities and states preparing for possible Zika outbreaks this spring and summer are losing millions of federal dollars that local officials say they were counting on, not only for on-the-ground efforts to track and contain the spread of the mosquito-borne virus but also to respond to other emergencies that threaten public health."

"Billionaire environmental activist Tom Steyer's super PAC launched a $25 million youth voter drive on Monday in seven political battleground states to help elect candidates that champion climate change policies in November's general election."

"For centuries, Lummi tribal fishermen have harvested, dug up clams and fished for salmon in the tidelands and waters of northwest Washington state. Now, the tribe says a proposed $700 million project to build the nation’s largest coal-export terminal threatens that way of life. The tribe last year asked federal regulators to deny permits for project, saying it would interfere with the tribe’s treaty-reserved fishing rights."

"William Gray, a pioneer in hurricane forecasting at Colorado State University and a skeptic of the science behind human-made global warming models, died on Saturday, the school said in a statement."

"The federal government is cleaning up a long legacy of uranium mining within the Navajo Nation — some 27,000 square miles spread across Utah, New Mexico and Arizona that is home to more than 250,000 people."