Biologists were unpleasantly surprised to discover that nutria, an invasive aquatic rodent, had returned to California in 2017 after being eradicated decades before. Now they're in a high-stakes battle to remove nutria from the state's waterways: Left unchecked, nutria could destroy crops, damage wildlife habitat, and wreak major havoc on dikes and dams, compromising California's water infrastructure. So far, the quick-to-reproduce nutria are spreading faster than biologists can handle.
California Cracks Down on Illegal Pot Grows, Pesticides
The state announced new efforts to fight the "catastrophic" environmental impacts of Mexican drug cartel marijuana operations.