Sun, wind, and water for electricity generation. For biofuels, corn, sugar, and soy bean fuel for starters. There are a few countries already using biofuels, India, Brazil, China, and Australia. Even the US uses some. Too, there are some generators running on dung.

There are still untapped oil reserves and the development of biofuels will replace a lot of motor fuel while conserving oil for the petrolium based plastics and electronics that we covet and must have.