These siblings are 'copying beavers' to save California from wildfires—and it’s actually working.

Kiefer Chow and Amelia Chow started Eco-Engineering In Action to build beaver dam analogues across California. These structures mimic nature to slow water flow, restore wetlands, and reduce wildfire risks. The siblings said they set out to "channel climate anxiety into action" by building these dams with local restoration groups.