Doubters remain. Few Americans are likely to view Bush and Rumsfeld as environmental heroes. Some skeptics see the “greening” of the Pentagon as an attempt to re-brand a military battered by far-flung wars and the dishonor of Abu Ghraib. And clearly the US Air Force, now the #1 user of renewable energy, can’t fly jets on gin (they have nonetheless begun to experiment with synthetic fuels derived from natural gas). Other skeptics contend that the rugged individualists of middle America are as unlikely to give up their Chevy trucks as they are to give up their guns. But caveat dubitor: there are precedents for the public following the Pentagon’s adoption of new technology, including the medium on which you’re reading this article now. Remember also that when the US army broke the color barrier after WWII and began to desegregate, the rest of America followed. As the army goes green...