system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How to the astronauts and everyone on the International Space station have oxygen?
gpt
Electrolysis of water (H2O) is the main method to generate oxygen aboard the ISS. Water is split into oxygen (O2) and hydrogen (H2). The oxygen is vented into the breathable cabin air system, known as theOxygen Generation System, while the explosive hydrogen is vented externally.