For example, they can add up how much gasoline is being burned and how many fossil fuel power plants are running at a given time, to calculate how much carbon is being exhaled into the atmosphere.

The object at this solar focal point will then get extremely hot, and you can use that hot thing to heat up water to produce steam and then turn an electric turbine.In fact it's mostly like the electrical energy from fossil fuels.

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.