Other alternative include electricity, biodiesel, bioalcohol, and hydrogen fuel.
There are a few options, although scientists are still trying to perfect the way we use them to make them more efficient!
There are lots of possibilities – for a start nuclear fusion is still being developed and the scientist who work on it tell us that hey’re near to being able to produce useful energy. Then there’s solar energy, wind, …
If the problem is running cars and lorries etc., then there are already cars running on gas or electricity.
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