It’s not going back underground, there’s not enough water to penetrate that deep. Most of it is evaporated or runs off.
Run off goes down to the ocean, and eventually it will turn back into clouds, travel inland, and rain down.
The problem is only X amount of water will reach inland, as a function of cloud dynamics, and only (X-Y) amount will be captured as useable water in water tables and reservoirs.
If we use more than X amount of water, the available fresh water will continually get lower and lower until we don’t have enough.
Latest Answers