![a recipe for zero emissions fuel soda cans seawater and caffeine](https://utterbuzz.com/wp-content/uploads/2024/07/a-recipe-for-zero-emissions-fuel-soda-cans-seawater-and-caffeine-640x427.jpg)
Engineers discovered that when the aluminum in soda cans is purified and mixed with seawater, the solution produces hydrogen — which can power an engine or fuel cell without generating carbon emissions. The reaction can be sped up by adding caffeine.