system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How can the world be running out of water? Even drinkable water?

I just don't get it. How can the world *apparently* be running out of water, some say just water and some say drinking water. But I don't understand how we could be running out of either? Just plain water has been here for millions of years, and water can always be purified.. I don't understand!
gpt
Only 1% of the Earth's water is safe for drinking. 98% is salt water. 1% is trapped in the glaciers. Most of the water we have is from freshwater reserves left by the last ice age. Only a couple feet are replaced worldwide annually by rain. Even today, there are *millions* without clean water to drink. Millions of people die every year from water illnesses from drinking contaminated water. It is a very real, scary thing that we are witnessing.