Almost free fresh water
free irrigation In Africa are the villages draw water out of a local stream or river, and the water there fix up contaminants and waste, and flows back into the river. So the next village has to use high pressure filtration or even boiling, to clean up the water before they can use it again. Energy as near the sea, are session the same high energy and potentially dangerous water purification systems, to turn the maintenance sea water into very little fresh water. High school physics shows us a better idea. We use a little solar powered vacuum pump, to apply one metre of vacuum to the river or sea water. Which then boils into fuel water vapour. Leaving all salts and contaminants behind. And obviously leaving behind all bacteria life forms! We just suck out the purest fresh water on the planet. Even Perrier water has a little salt in it - for flavor. We would prefer totally fuel water, to irrigate the fields and water the animals. And wa...