For years, the Vehicle Technology Office has been focused on swapping out conventional gasoline with more environmentally friendly biofuels .“An internal combustion engine can utilize a wide range of fuels, and some of those can be partially renewable,” says Howell.

In 1990, the state tightened its standards again, and added a new component: Its Low-Emission Vehicle program required that automakers sell some zero-emission vehicles, as in battery and fuel-cell electric cars.

Still, it's energy from food.Burning StuffLet's say you want to heat up some water. Is it possible to use energy from food to heat the water? Changing the nucleus is what happens in a nuclear reaction.OK, so take an atom like Uranium-235.