Gary Yohe, the John E. Andrus Professor of Economics, suggests that the government place a growing tax on the cost of carbon during a hearing March 30 in Washington D.C. Posted 04/17/06 When Gary Yohe, the John E. Andrus Professor of Economics, received a call from Senator Joseph R. Biden's office to testify before the U.S. Senate Committee on Foreign Relations in Washington, D.C., he didn't hesitate. In fact, he hurried. Yohe, who was the sole expert, recommended by both the Environmental Defense Fund and Pew Center on Global Climate Change to Senator Biden's office, had only a few days…