In their most recent trashing of California's environment, pot growers destroyed rare plants on Mount Diablo land that conservationists are buying to protect fragile wildlife and plants. The growers sneaked onto the 208-acre ranch land in the hills above Concord to hack an opening in a thicket of desert olive, the group Save Mount Diablo said. The olive plant, a leftover from long ago when the Bay Area resembled a desert, is found only in two or three places in the county. The pot growers apparently harvested and toted off their cash crop without detection. No people nor pot plants...