The X2 line is the place where saltwater and freshwater meet in the Sacramento-San Joaquin Delta. It might be one of the most important spots in California’s water story.

Airplanes have compromised air. What does air travel mean for the environment and for the people who work or live near all those airplanes?

After years of chasing them down and killing them, California realizes how valuable the beaver can be at fire prevention.

In one place in the Bay Area, bulldozers are being used to rebuild an ecosystem, not destroy it, and that’s providing economic opportunities for new immigrants in the process.