With its dense forests, foggy climate and rugged coastline, California’s Humboldt County has long been synonymous with its biggest cash crop: marijuana. Cannabis has thrived here — both before and since the state legalized it for medical purposes in 1996. The industry has been booming in the last few years, and with little regulation it has had a huge impact on the environment. A report, published by the California Department of Fish and Wildlife, quantifies some of that impact for the first time. (See also: Is pot causing the California drought?)