Emily Guerin

SoCal's largest single source of air pollution is the ports of LA and Long Beach. Critics say the ports have a long way to go to help the area meet federal air standards.

Just because it rains doesn't mean the effects of drought are over. A new study finds trees are taking longer to recover, making them more vulnerable to another drought before they've fully bounced back.

The threatened animals tend to pace back and forth along protective fences, exposing them to the sun and heating their bodies to sometimes lethal levels.

A new study finds the roofs, which combat the urban heat island effect, can actually worsen smog and particulate matter.

What is it like to watch the forest die around you? Residents of an alpine town in Kern County say living among drought-killed trees has been a challenge.

The nation's second-largest transit agency wants to switch all 2,200 buses from natural gas to zero-emissions technology. That means kicking the internal combustion engine.

Closing windows, recirculating air and replacing your air filter can help keep unhealthy particulate pollution our of your car — and lungs.

Truck drivers worry they will bear the high costs of upgrading diesel trucks to expensive, zero-emission technology.

The plan relies heavily on incentives to switch trucks and equipment over to zero emission technology, which critics say will not be ready, or cost effective, in time.

Brown needs a two-thirds majority vote of the legislature to extend the state's signature climate policy through 2031. The legislature is supposed to vote today.

Mayor Eric Garcetti has a goal of lowering the city's temperature three degrees by 2035 through a combination of reflective pavement, more trees, and less heat-absorbing rooftops.

A bumper crop of grass, now withering under searing temperatures, coupled with millions of dead trees has increased the threat of fire in the Sierra Nevada.