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Clean, drinkable water.


 
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#1 Shortpoet-GTD

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Posted 19 March 2015 - 05:16 AM

Almost every day, we read about the newest technologies for solar, wind turbines,
phones, cars................
but clean, drinkable water is our most pressing need.
Without water, the world's economies collapse.

Question being; why aren't our many gifted brainiacs in the tech world working
on delivering a cheaper solution to desalting our ocean water into drinkable water?
Surely, there's a cheaper way than spending billions? :wacko:

It's time has come (maybe already passed) because of minute snow packs and droughts.

(From an older article)
http://www.sfgate.co...ght-5239096.php

#2 still learning

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Posted 19 March 2015 - 08:08 PM

View PostShortpoet-GTD, on 19 March 2015 - 05:16 AM, said:

.....but clean, drinkable water is our most pressing need.
........delivering a cheaper solution to desalting our ocean water into drinkable water?
Surely, there's a cheaper way than spending billions?
    There may not be a cheap enough way.  Not cheap enough for agricultural use anyway.  Not as agriculture is practiced now in the US.  Cheap enough for drinking water sure, but maybe not cheap enough for industrial use or toilet flushing or car washing or golf courses.  There's a theoretical minimum amount of energy needed to separate out the salt from seawater, that minimum amount being 0.86 kwh of energy per cubic meter of seawater (see http://www.desware.net/desa4.aspx    or even http://www.mdpi.com/...4300/13/10/1829   )   If I have it figured right, paying for just that theoretical minimum amount of energy would be about the same as the maximum amount that a US farmer or rancher has to pay for irrigation water now, with most irrigation water costing far less.  Desalination plants now operate nowhere close to that theoretical minimum, so there's certainly room for improvement, but knowing that even achieving the very best possible design might not be good enough so that farmers could afford the water has got to be discouraging.  Better to figure out ways to conserve water.  Actually, that's not true, ways are already known, have to implement them.

#3 Shortpoet-GTD

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Posted 20 March 2015 - 04:10 AM

California's water board has within the last few days (March 2015) instituted a few (measly, mini, minute)
restrictions on water use.
One person said-
“This is small potatoes in terms of water conservation.”

(10% isn't much-it should be much higher; like 50-60%. But they don't want to anger their constituents.) :wacko:
http://www.sfgate.co...ing-6139559.php

More states in the west must do the their part too; especially Las Vegas.

#4 Protecting Environment

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Posted 05 November 2016 - 10:22 AM

The initiatives taken by the authority to prevent waste of water is 100% right in my sense. Because if we waste water without taking consideration of its disadvantages ( wasting of water), we  will face a serious problem in the future for water use in household and industrial use. we also know municipal street sweeping also requires huge amount of water to sweep roads and cities. This water requirement is mandatory because our environmental issues and public health is involved in this question of sweeping services.
So, we must see authority's steps positively.

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