April 24, 2018, 1pm PDT
Despite ever-stricter air-quality regulations and dropping emissions, the American Lung Association once again finds the state to have some of the worst air in the nation.
April 3, 2018, 12pm PDT
EPA Administrator Scott Pruitt announced Monday that his agency is siding with auto manufacturers and relaxing greenhouse gas emission standards for new cars and light trucks.
March 18, 2018, 11am PDT
As a result of a federal court ruling on March 12, the Environmental Protection Administration will be compelled to do what it should have done by October 1: Identify regions of the country where the air quality violates smog standards.
January 31, 2018, 12pm PST
Poor air quality has decimated the health of residents in this predominantly black community ringed by highways.
March 27, 2017, 9am PDT
A legal battle is looming between the nation's two most powerful environmental regulators after the California Air Resources Board on Friday defied President Trump by approving vehicle fuel efficiency standards that Trump has promised to ease.
January 24, 2017, 9am PST
Oklahoma Attorney General Scott Pruitt suggested that as administrator of the Environmental Protection Agency he might not allow California to set its own stricter motor vehicle emissions standards.
January 13, 2017, 11am PST
Similar violation but new player—Fiat Chrysler, accused by U.S. EPA of willfully violating emissions standards for certain models of diesel Jeeps and Ram pickups. The charge comes a day after DOJ settled civil and criminal suits with Volkswagen.
December 27, 2016, 12pm PST
It's not Southern California, with its ports and congested freeways, California's Central Valley, with its bowl-like topography, Houston, with its oil refineries, or the midwest, with its coal power plants. Hint: think Santa Claus.
March 22, 2016, 10am PDT
The South Coast Air Quality Management District is in the news again, this time for going too easy on the region's big polluters—just what staff had warned would happen before the board fired its well-respected executive director.
March 21, 2016, 11am PDT
Expect EPA to be radically downsized and stripped of much of its authority should a Republican become the next president. Democrats haven't stepped up to their defense as one might expect after the mishandling of the Flint water crisis.
February 6, 2016, 1pm PST
Good news for the United States is found in a recent series of maps by NASA. Air pollution has significantly improved around the country.
November 10, 2015, 5am PST
London Mayor Boris Johnson has tabled strict air-pollution controls until 2020 despite evidence of increasing pollution levels in the city's center.
October 15, 2015, 11am PDT
Credit EPA emission regulations for the decisions by utilities to close the aging plants. Michigan receives half its power from coal—the most polluting fossil fuel. The new Clean Power Plan rule will cause more remaining plants to close in time.
October 2, 2015, 10am PDT
The EPA chose to reduce the current standard of 75 parts per billion, unchanged since 2008, by 5 ppb. Public health and environmental groups insist that a safe standard would be 60 ppb, while businesses point to the high costs to comply with 70 ppb.
July 25, 2015, 9am PDT
San Antonio's soon-to-be-adopted air quality plan will focus on transportation to reduce the city's air pollution.
July 5, 2015, 9am PDT
When the Supreme Court ruled 5-4 against the Environmental Protection Agency on June 29, it appeared as a blow against mercury regulation by the EPA and a victory for coal power plants. David Roberts of Vox looks closer and finds that's not the case
January 15, 2015, 10am PST
President Barack Obama hopes to add to his "climate legacy" by having the EPA adopt the nation's first regulations to reduce methane emissions, the second most prevalent greenhouse gas emission after carbon dioxide, but far more powerful.
November 27, 2014, 7am PST
The top court's decision on Tuesday to review the first-ever regulation of mercury is a setback for Obama's environmental agenda, in part because it has implications for other EPA initiatives including Wednesday's proposal to tighten the ozone rule.
August 25, 2014, 2pm PDT
Phys.org shares the details of a new report by the U.S. Environmental Protection Agency about the air quality benefits of the Clean Air Act for cities around the county.
June 23, 2014, 11am PDT
In a 5-4 decision on June 23, the Supreme Court ruled that EPA erred in the permitting processes for new carbon-cutting rules. However, most of the Clean Power Plant rule that reduces emissions 30 percent will not be affected.