“How can we make planes that do not rely on fuel?”
As it stands, the vast majority of the world’s air travel infrastructure rests upon hydrocarbon-based fuel. However, is there a more sustainable model to this approach? Well, if we use our engineering mindset, then we would be able to see that this jet fuel is fundamentally just energy storage, and that another option is batteries. Therefore, we can create battery-powered planes in place of their traditional alternatives. One caveat is that current battery technologies have 1/60th the energy density of plane fuels, making them a much less viable option.