Water.W drink it. We cook with it.We wash with it. We are made of it. Sadly there is not enough of it. California has been facing drought for many years.Even Though we had a bunch of rain recently,only 39% of our state is out of drought.
The earth is a closed system,.Only 2.5% of earth's water is freshwater.Water does not escape from our atmosphere it continues in a thing called the cycle.If you want to be technical about it,you are drinking the same water as the dinosaurs.Obviously we don't have fresh water to spare.
To be responsible with taking shorter showers is good… but not enough now we need to conserve and reuse. Of our world’s 2.5% freshwater we only have three sources. Surface water is 1.2% that is found in lakes