If not a single drop of rain fell again, we could still enjoy plentiful and cheap drinking water.
The most expensive way to produce safe clean water is from seawater. It costs about 40 cents per cubic meter (or 4KWh of energy).
Our average consumption is 500 litres per day.
That's half a cubic metre.
Or 20 cents per person per day.
Or $73 per year !
That's about 10 hours minimum wage labor for a full years supply of clean fresh drinking water from the most expensive source of supply.
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(Which interestingly, is the exact same cost as running a personal electric car for a whole year also)
* For sources, just wiki or google desalination, water usage etc. |
