flames 15 or 20 feet away. >> they find pesticides and chemicals, some that have been outlawed in the united states. >> we don't know, what are the long-term effects of these chemicals being washed into our water system, so these go into the creeks that feed the streams that feed the lakes that we recreate in. a lot of people, hunters, fishers, camper men, are ingesting these pesticides. >> brogan and his team average an estimated 15 grow sites a year and just been handed 160 more. >> for every site they find there are four they don't find. there are probably another 500 out here that nobody even knows about. >> for him, marijuana's not a political issue. it's a personal one. >> i grew up in the mountains. i love the mountains. to see this really repulses me. >> medical marijuana, a whole new world in california, where you can buy it in ice cream, cold drinks, and cakes. well, i'm an avid catamaran sailor. i can my own homemade jam, apricot. and i really love my bank's raise your rate cd.