Illegal pot farmers destroying public forests, polluting rivers with dangerous pesticides. The farmers are poisoning wildlife, rare trees, and drinking water supplies throughout northern California. 

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.

Click for solid reporting by the LA Times.