system
Given the following post, respond as if you're commenting on Reddit:
human
eli5 What is nuclear fusion and how is it significant to us?
gpt
Nuclear fusion is the process of taking two atoms and smashing them together. This creates a new element, but more importantly it produces a ton of energy. For example we could take some hydrogen atoms, smash them together and make helium. Helium isn't dangerous to the environment and we are actually running out of it so it being a byproduct would actually be a pretty cool bonus. 

In other words it would basically grant massive amount of clean energy anywhere in the world. Currently our fusion generators aren't efficient enough to produce enough energy to counteract the amount need for containment on a reasonable scale, but hopefully we get there. Clean borderline limitless energy.