marijuana plant
ShutterstockPot: not so green.

We’ve written before about the environmental damage done by marijuana growers — massive energy consumption, indiscriminate pesticide use, dead little forest critters, both cute and uncute. Now the L.A. Times reports that pot growers in California are also undermining salmon recovery efforts, poisoning bears, and even threatening our BFFs: dogs.

The marijuana boom that came with the sudden rise of medical cannabis in California has wreaked havoc on the fragile habitats of the North Coast and other parts of California. With little or no oversight, farmers have illegally mowed down timber, graded mountaintops flat for sprawling greenhouses, dispersed poisons and pesticides, drained streams and polluted watersheds.

Because marijuana is unregulated in California and illegal under federal law, most growers still operate in the shadows, and scientists have little hard data on their collective effect. But they are getting ever more ugly snapshots.

Here’s the bad news about salmon:

State scientists, grappling with an explosion of marijuana growing on the North Coast, recently studied aerial imagery of a small tributary of the Eel River, spawning grounds for endangered coho salmon and other threatened fish.