Reuters: Californians’ thirst for water has pushed salmon and other fish to the brink of extinction, a federal agency ruled on Thursday as it directed officials to cut water supplies to cities and farms to save several species. California’s rivers used to brim with trout, salmon, sturgeon and more, but the federal, state and local governments built a monumental system of dams and pipelines in the most populous that turned a desert into productive farmland and left some rivers dry. The …