Can we make water ourselves?
Theoretically, this is possible, but it would be an extremely dangerous process, too.
To create water, oxygen and hydrogen atoms must be present. Mixing them together doesn’t help; you’re still left with just separate hydrogen and oxygen atoms. The orbits of each atom’s electrons must become linked, and to do that we must have a sudden burst of energy to get these shy things to hook up.
Since hydrogen is extremely flammable and oxygen supports combustion, it wouldn’t take much to create this force. Pretty much all we need is a spark – not even a flame – and boom! we have water. The hydrogen and oxygen atoms’ electrons’ orbits have been conjoined.