Technically, if you think about it, water is the real fossil fuel. If a fossil is just "formerly living matter" and nearly all life on Earth is made out of mostly water. It doesn't just disappear when things die, water evaporates and returns to the natural water cycle. And with the way water mixes together, I bet it would be difficult to find even a single cup of water in any ocean, kitchen sink, or can of soda that wasn't already water from thousands of living things (The planet Earth and its water have been around for billions of years). And water can even be broken down into hydrogen and oxygen, which is basically rocket fuel.