Illegal Pot Farms Damaging the Environment:  With illegal marijuana farms flourishing across California, scientists are finding that they are having a serious negative impact on the environment.  Christopher Weber of KCRA News reports that after two men were arrested for illegally growing around 9,000 marijuana plants on public land known as Emerald Triangle in Northern California, state authorities found an illegal and highly toxic rodenticide, which could kill a 300 lb. bear, along with piles of trash. Following discovery of Carbofuran which is a banned neurotoxicant that is used to kill rodents on illegal pot farms, scientists warn that it could completely destroy the wildlife population near an illegal grow.  The trash left at the sites, which include food containers, attract animals who ingest the rat poison and fertilizer, which are also being found in streams near the farms.  Illegal pot farms have increased since the legalization of marijuana, with and estimated sales of $9 billion compared to $3 billion for legal market.  The state recently decided to raise taxes on legal marijuana on January 1, which will encourage further expansion of the illegal market.