"Concluding a long legal climb to cleaner air, the federal government Monday announced a record $425-million settlement with two oil refiners that is expected to reduce pollution emissions in the West by almost 43,000 tons annually."

"Under new rules announced by the Environmental Protection Agency (EPA) on Friday, solid waste landfill operators must begin capturing methane emissions from their sites at levels one-third lower than current standards permit."

"Outside Susan Holmes' house in southeastern Oklahoma, visitors are welcomed by an entryway lined with oxygen bottles and a machine that collects and concentrates oxygen from the air."

"Nearly three decades after the world banned chemicals that were destroying the atmosphere’s protective ozone layer, scientists said Thursday that there were signs the atmosphere was on the mend."

"Volkswagen has agreed to pay up to $14.7 billion to settle claims stemming from its diesel emissions cheating scandal, in what would be one of the largest consumer class-action settlements ever in the United States."

"Premature deaths from air pollution will continue to rise to 2040 unless changes are made to the way the world uses and produces energy, the International Energy Agency said on Monday."

"The U.S. Supreme Court on Monday turned aside the latest effort by a group of states led by Michigan to block Obama administration environmental regulations limiting power plant emissions of mercury and other toxic pollutants."

"Oil refineries have sued to overturn a series of new air pollution rules aimed at reducing emissions 20 percent at each of the Bay Area's five gasoline plants, the largest source of industrial pollution in the region."

"Through the Smoke and Fumes Committee, industry blurred the science surrounding air pollution and worked to forestall unwanted regulation."