The document discusses predictions about future energy sources and consumption of oil reserves, noting that predictions from the 1970s of oil being depleted by the early 21st century were exaggerated but that at current consumption rates oil resources will be used up within 100 years. It also outlines developments in alternative energy sources like biodiesel, solar, electricity, and hydrogen and predictions that half of vehicles will run partially on electricity and gasoline by 2024 and all new US cars will use hydrogen by 2038.