Fearful of possible cancers and a poisoned environment, some Californians are alarmed at a proposal that could triple the use of herbicides on western federal lands.But a Bureau of Land Management official said this week there is a lot of misinformation and wild rhetoric spreading about the broad-based proposal that is hardly in stone.According to Brian Amme at the BLM office in Reno, the proposal is to treat 932,000 acres in 17 western states every year with herbicides. The idea is reduce wildfire risks and get rid of non-native, noxious weeds.The BLM has lands along the South Yuba River and …