Emily Guerin

The study, if authorized, pits Angelenos who say their health is affected by living near oil wells against the city's oil and gas producers.

The Citizen Nature Challenge wants to find out which city's citizens can document the most nature in the course of a week. The challenge runs April 14-18.

A new report finds that sea levels are rising twice as fast as they did in 1990. Southern California is already feeling the impact.

The Environmental Protection Agency says it is reviewing an Obama-era ozone standard. Critics say it's the first step towards weakening the rule.

Regulators worry the bill will make it more difficult to clean up L.A.'s worst-in-the-nation smog, because heavy trucks are the largest contributors to smog.

Officials hope new signs along the wildflower trail at Diamond Valley Lake will encourage people to stay on the trail and out of the poppies.

Not all of the region's water sources have rebounded, despite above average rain and snow. Areas that don't import any water are still in conservation mode.

Meanwhile, the U.S. Congress is considering repealing an Obama-era regulation that cracked down on methane leaks from oil and gas companies on federal land.

Trump is proposing cuts to many areas of government, including environmental oversight, transportation and medical research, while boosting spending for the military and to build a border wall.

Record visitation has overwhelmed park employees and caused damaged to the fragile desert ecosystem.

Truck drivers say ports pushed low-emissions vehicles without testing whether they could handle the demands of hauling cargo.

A new study finds that biodiversity is greater inside the oldest marine protected areas than outside them.