system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Where do Space Stations get their oxygen from?

Where do Space Stations like the iss get the oxygen for their workers from? Flying it all in from earth?
gpt
The primary source of oxygen is water electrolysis, followed by O2 in a pressurized storage tank. 

The process of electrolysis uses electricity from the ISS solar panels to split water into hydrogen gas and oxygen gas.