"U.S. regulators on Wednesday postponed until 2020 new limits on toxic metals and other pollutants in the wastewater of coal-fired power plants, a delay welcomed by industry groups that had sought it but decried by environmental groups."

"California sued the federal government Monday over the Trump administration’s decision to postpone indefinitely a decision by former President Barack Obama to dramatically increase the penalties for violating federal fuel economy standards."

"Hurricane Harvey's floodwaters triggered a spill of almost a half-million gallons of gasoline from two storage tanks along the Houston Ship Channel, marking the largest spill reported to date from a storm that slammed into the heart of Texas' huge petrochemical industry."

"Advocates concerned about pollution from petroleum coke are worried an Ohio professor’s study downplaying the risks will gain new prominence now that he has been named to a key EPA post."

"Floodwaters in two Houston neighborhoods have been contaminated with bacteria and toxins that can make people sick, testing organized by The New York Times has found. Residents will need to take precautions to return safely to their homes, public health experts said."

"Commemorations for the anniversary of the Sept. 11 terrorist attacks began in New York late last week as they have for multiple years, with twin beams of light piercing the night sky, a tribute to those lost in the World Trade Center that could be seen across the region."

"For much of this week and last, devastation wrought by Hurricane Harvey in Houston and Hurricane Irma in the Caribbean has grabbed front-page headlines. But wildfires in the West have been wreaking destruction of their own, though it has attracted less attention. Vast swaths of land have burned, choking the air with ash and smoke."

"MIAMI -- Dozens of personnel from the Environmental Protection Agency worked to secure some of the nation's most contaminated toxic waste sites as Hurricane Irma bore down on Florida. The agency said its employees evacuated personnel, secured equipment and safeguarded hazardous materials in anticipation of storm surges and heavy rains."

"Houston’s sprawling network of petrochemical plants and refineries released millions of pounds of pollutants in the days after Hurricane Harvey began barreling toward Texas."