system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does salt water naturally exist on Earth and why is there so much more of it than regular fresh water?
gpt
Salts are really common chemical compounds.

Water is a very good solvent.

It's not really surprising that large amounts of minerals end up in solution in large scale water reservoirs. It's just in lakes and rivers, the water moves on before it has a chance to get too salty.

Except when the lake doesn't flow anywhere and you get the dead sea.