Super amazing science project for PJAS?

So for PJAS (basically a science fair presentation), I need a project. I really want a project that deals with chemistry/biology, but anything else is all right. I can't think of a god project to impress the judges. I really want to get far with this project. It can't be something elementary. It needs to be... show more So for PJAS (basically a science fair presentation), I need a project. I really want a project that deals with chemistry/biology, but anything else is all right. I can't think of a god project to impress the judges. I really want to get far with this project. It can't be something elementary. It needs to be something big and meaningful to the world. I was going to do Turning Plants into Biofuel with the power of Enzymes, but it costs too much. Is there any project along those lines that is actually "hard" and educated and meaningful? Thanks!

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