All the water consumed on earth returns to the earth through the natural evaporation cycle. We all learned this in elementary school.
Also, here's a line copied from Wikipedia:
"While it is difficult to estimate the total water content of the mantle due to limited samples, approximately three times the mass of the Earth's oceans could be stored there. Similarly, the Earth's core could contain four to five oceans' worth of hydrogen."
These films are produced by simple minded producers to scare the population. Don't just believe them, do your own investigations.
Think about all the scams being pushed now days.
