The document discusses alternatives to fossil fuel vehicles, including flexible fuel vehicles that can use up to 85% ethanol (E85), electric vehicles, plug-in hybrids, and hydrogen fuel cell vehicles. It notes that while fossil fuels are limited and polluting, various renewable alternatives exist or are being developed. Flexible fuel vehicles can use ethanol from plants like corn, sugar cane, or switchgrass. Electric vehicles have no tailpipe emissions but limited range, while plug-in hybrids can run almost entirely on electricity for daily use. Hydrogen fuel cells produce only water vapor but fueling infrastructure needs to be developed further. The presentation evaluates the pros and cons of each option.