"Authorities declared an environmental emergency on Tuesday for metropolitan Mexico City, one of the world’s most populous megalopolises, as smoke from nearby wildfires pushed pollution to levels deemed potentially harmful to human health."

"A secretive utility industry coalition formerly represented by a top official at the Environmental Protection Agency is dissolving amid investigations into whether its members received special treatment from the Trump administration."

The production of oil and natural gas in West Texas is booming but it’s coming at a cost to residents who are regularly exposed to unhealthy levels of air pollution, according to a report issued by an environmental group."

"Three nonprofit organizations will use a network of satellites and artificial intelligence to track carbon emissions from every power plant in the world under a $1.7 million project announced by Google.org. yesterday."

"Maryland environmental regulators were in talks with a Western Maryland paper mill about how to significantly reduce the facility’s output of a harmful pollutant when its owner shocked state officials last week by announcing plans to shutter the 131-year-old factory."

"Millions of tourists will head out into America’s national parks this summer in search of fresh mountain air. But according to a new report they should instead expect dangerous levels of pollution; roughly 96% of the nation’s parks are struggling with significant air quality issues."

"The Trump administration has illegally delayed rules limiting the discharge of climate-changing methane gas from landfills around the United States and must act on plans for California and several other states by September, a federal judge ruled Monday.

The EPA was to approve or disapprove the state plans by Sept. 30, 2017, and to prepare its own solution two months later for states without an approved plan.

"Two environmental organizations filed a federal lawsuit in Pittsburgh Monday alleging that U.S. Steel Corp.’s illegal operation of its three Mon Valley facilities following a Dec. 24, 2018 fire, that knocked out pollution controls at its Clairton Coke Works, damaged the health of nearby residents."