system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does 100% humidity not mean water everywhere?
gpt
Atmosphere, which is a collection of gasses (including water vapor), has physical properties (temperature, pressure, etc) that let it hold a certain amount of moisture. Anything past that limit, and you can't add more moisture to the air. It's holding as much moisture as possible. So 100% doesn't mean you're walking around underwater, it just means the air is fully saturated with moisture.