What is the total water supply for the earth?

the total amount of water in the earth is decreasing.

Answero:

The amunt of water on EArth is essentially constant. It is however not in the same location or quality over time. Water evaporates from tohe oceans, becomes contaminated in the soil, precipitates ot as ice and snw for long term storage, is created by fires, relased by volcanoes and disappears into the groundwater aquifers.