Re: We already burn Hydrogen
The sun is not burning hydrogen - it is nuclear fusion. There is no oxygen to burn hydrogen in space
Our sun is at the stage in it's life where it's making oxygen so there's plenty of it there, you don't get combustion because it's too damn hot.
Oxygen is the third most abundant element in the universe followed by Carbon in 4th.
H + He + O + C account for 99.96% of all the atoms in the universe so we can disregard everything else as noise.