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Air quality officials are giving a battery recycling plant in Vernon another chance to prove it can operate without putting nearby residents at risk.

Despite demands from community groups calling for permanent closure of the Exide...

Air quality regulators have reached an agreement with Exide Technologies that would bar its battery recycling plant in Vernon from resuming operations until it installs new controls on arsenic emissions that pose a health...

Pennsylvania's Department of Environmental Protection has begun an extensive sampling of chemical contaminants in response to the discovery of intersex fish in three of the state's rivers, a department spokeswoman said.

Male fish carrying...

A year after rail tanker cars carrying crude oil in Canada exploded and killed 47 people, California is stepping up efforts to prevent a similar disaster on tracks crisscrossing the state.

In recent weeks, the state began pumping more money...

After years of complaining about working conditions, truck drivers who move goods at Southern California's sprawling ports appear to be making headway.

Drivers have filed lawsuits and have flooded the state with hundreds of claims alleging that...

The Supreme Court led by Chief Justice John G. Roberts Jr. showed again this year that it is playing a long game, writing opinions that move the law in small but steady steps in a conservative direction.

At first glance, many of its decisions...

As a former resident of Bakersfield, I cringed when I read state Sen. Kevin de León’s comments about the decision to start building the bullet train in the Central Valley – a place he described as “the middle of nowhere&...

Not only can you fight City Hall, sometimes City Hall can fight itself and win — defeating civic inertia and civic politics.

So, good job, Los Angeles! As of Tuesday, the city’s January ban on single-use plastic bags for many big...

You know those colorful, plastic, exfoliating microbeads suspended in hundreds of face and body washes, scrubs and toothpaste? They can pollute waterways and poison fish and birds. Environmentalists, politicians and others, including groups in Los...

In the Bay Area oil port city of Martinez, where a colossal Shell refinery has long tainted the air, the landmark California law that requires polluters to ease their carbon footprint seemed to some to promise new relief.

But one big move by...

California's latest move to combat global warming will either siphon dollars from motorists' wallets or save them big money on their gasoline bills.

Those are the starkly different predictions being bandied about the Capitol by critics and fans...

A committee of scientific advisors has urged the U.S. Environmental Protection Agency to adopt a tougher federal standard for ozone, saying current limits on the lung-damaging pollutant fail to protect public health.

James Pitts, an influential smog researcher whose work was used to craft California's pioneering air quality regulations, has died. He was 93.

Pitts died in his sleep of natural causes at his Irvine home on June 19, according to his wife,...

House Speaker John A. Boehner (R-Ohio) isn’t just speaking partisan craziness when he says he plans to initiate a lawsuit against President Obama for overzealous executive action — in other words, the president making law when Congress...

The Obama administration’s drive to regulate global-warming gases won a surprising victory in the Supreme Court on Monday with the support of two conservative justices.

Chief Justice John G. Roberts Jr. and Justice Antonin Scalia...

The Obama administration Monday morning unveiled its far-reaching proposal to curb climate change by substantially restricting emissions at power plants, a plan that promises to set off intense debate across the country amid the president’s...

Stymied by the partisan gridlock, President Obama's recent directives to bar federal contractors from discriminating against gay employees and to cut carbon pollution are bold examples of how presidents have used their executive powers to address...