California

California's state Senate leader has an idea to resolve mistrust generated by Gov. Jerry Brown's plan for two giant water diversion tunnels in the Sacramento-San Joaquin Delta: new legislation that would lay out regulations for how the tunnels would operate.

In Marin County a zero-emissions bus, powered by hydrogen fuel cells, is rolling through the county's streets and on Highway 101 – part of a California state plan to cut the amount of diesel pollutants standard buses spew into the air.

Rocks tumbled down the nearly vertical slope as Todd Keeler-Wolf jumped, slid, clutched branches and crawled over crumbly rock and poison oak to reach what, to scientists, is a cliffside holy grail: the last living specimen of the magnificent ancient forests that once dominated the East Bay hills.

A growing trove of scholarly studies, interviews with former Republican politicians and with leaders of the denial camp show a concerted public relations campaign to cast doubt on climate science.

When Daniel Wilson learned earlier this year that the state of California wants to bulldoze his family's pear orchard to build a giant Sacramento River water diversion, he and his brother were making a major new investment in the crop.

Jerry Meral, deputy secretary at the California Natural Resources Agency, said the tunnel plan - known technically as the Bay Delta Conservation Plan, or BDCP - won't ultimately help the delta.

A strange seabird hanging around the Farallon Islands has created quite a ruckus among scientists, who have identified the sleek, mostly white creature as a species of booby never seen before in this part of the world.

The California desert's signature tree has gotten a lot of attention lately: the story of this year's record bloom has reached a global audience. And the developing narrative is that the unusual bloom can be credited to climate change.

To mark Earth Day this year, we're talking with Scott Claassen. He's a leader of Thad’s, a community of missionary Episcopalians in Santa Monica, and he advocates a "Carbon Sabbath."

Central Valley communities are among the hardest hit in California under a unique new misery index that provides statewide mapping on community pollution, health and well-being.