Testimony of former Federal Reserve Board Chairman Alan Greenspan to the Senate Foreign Relations Committee yesterday has gotten quite a bit of news coverage, especially his comments about ethanol. In his written remarks to the committee, Greenspan said “Corn ethanol, though valuable, can play only a limited role, because its ability to displace gasoline is modest at best. But cellulosic ethanol, should it fulfill its promise, would help to wean us of our petroleum dependence, as could clean coal and nuclear power.” Google News Search lists over 300 articles related to Greenspan’s remarks mentioning ethanol.