Enhanced geothermal energy is potentially a nearly limitless source of competitive electricity. Increased energy efficiency is already saving businesses money and reducing emissions significantly. New generations of biomass energy — ones that do not rely on food crops, unlike the mistaken strategy of making ethanol from corn — are extremely promising. Sustainable forestry and agriculture both make economic as well as environmental sense. And all of these options would spread even more rapidly if we stopped subsidizing Big Oil and Coal and put a price on carbon that reflected the true cost of fossil energy — either through the much-maligned cap-and-trade approach, or through a revenue-neutral tax swap.