Giving world villages free water
free fresh water For a historic reasons in buying transportation of goods by canal or river committees and towns tend to be built by rivers. All forms tend to be based around streams. And coastal towns were very popular! The growing problem was, providing the people with clean water! Which tended to pumped in from miles away - the Roman idea. Still used by Water Aid to make fresh drinking water. Higher pressure filtration is very energy intensive! Not that much better than just boiling off the water, and condensing the water vapour. A far better idea, is to apply a vacuum to liquid water. By physical definition are applying one metre of vacuum, will coals water or even ice, to boil away into fuel water vapour. So this goes off at 0° C! Were usually the water is far warmer than that. So we are talking and 90 cm of vacuum. Go with one metre - it is easier to write up. So we take brown river water, and apply one metre o...