Speaking of cars, President Bush's FreedomCAR and Fuel Initiative has ceded its brief control over the headlines to war cries, snowstorms, and Michael Jackson's second coming. But the plan still merits attention, both for its deep flaws and for the opportunity it offers to define a broader plan of action -- one capable of mapping the shift toward a hydrogen-based energy system that will permanently wean us off of our environmentally disastrous dependence on fossil fuels. In this month's Powers that Be column, renewable energy expert Amanda Griscom assesses the economic, environmental, and marketing issues that must be addressed to make that shift possible. Read the definitive word on fuel cells, only on the Grist Magazine website.