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Only 0.01% of total

It is said in the media such as TV that Fresh water is 0.01% of total, so it is valuable.
Is that true?
It is only 0.01% of total.
If it is enough for humankind to live, you have no lack of water.
Water of carried into the sea by rivers from land is 40000-50000km2 per year.
Total amount of water used by humankind is 3800km2 per year.
In other words, humankind uses about 10% of available water.
There is enough water on earth.
Why are there many people suffering from lack of water?