Question: If you could invent one thing that would benefit the world in any what would you invent?

Laurence Perreault Levasseur answered on 16 Jun 2014:

I would invent a way of making hydrogen nuclear fusion on Earth in a controlled way, so that we can produce energy for the planet out of it. Hydrogen fusion is the was the sun produces it’s energy, so it’s like harnessing the energy source of the stars! Hydrogen is the number one most abundant element in the Universe, so it would be an almost infinite energy source. It’s also completely clean, because the only waste product is helium, which is not dangerous at all. That way, humans would be done with oil and fossil fuels and the pollution they produce, and hugely contribute to solving (or at least alleviate) global warming problems. Because it’s everywhere and very abundant, there wouldn’t be any problem with the supplies of raw resources, and so from a political point of view it would alleviate a lot of conflicts in the world.

But that’s not it! With nuclear fusion, it would be possible to travel to other stars (currently it’s impossible because there is no way we can bring enough fuel!) and make spaceships that fly insanely fast. And because hydrogen is everywhere, we could get the fuel from the interstellar medium! That would be insanely cool!