1.5 billion people live without electricity and 3 billion still rely on primitive fuels like wood or charcoal for cooking and heating.—but it’s time to change all of that. Solar power is growing exponentially. America is only two decades away from achieving energy independence via solar. Africa has enough solar potential to supply the present world’s energy needs 40 times over. Synthetic biology is poised to replace the gasoline in our cars with bio-fuels grown from algae; storage technology is maturing rapidly, and the smart grid is beginning to come online.