Hedge fund billionaire Tom Steyer pushes environmental issues
                                
                                
                                    (Newser) -
                                    A hedge-fund billionaire and his wife, a community bank CEO, originally aimed to use their 1,800-acre California ranch to show off soil conservation techniques—but today, it's become a model sustainable farm, and apparently a highly profitable one. At TomKat Ranch, Tom Steyer and Kat Taylor raise grass-fed...