<story><title>Passive Solar Water Desalination</title><url>https://theness.com/neurologicablog/index.php/passive-solar-water-desalination/</url></story><parent_chain><item><author>joshe</author><text>Advances are always welcome, but it&amp;#x27;s worth noting that desalination works economically right now.&lt;p&gt;In the last 15 years large scale desalination has become practical. It&amp;#x27;s one of the great engineering feats of our time.&lt;p&gt;We can now generate it at scale for less than $.01 per 6.4 gallons. This includes the cost of the electricity, which is about half the expense.&lt;p&gt;San Francisco charges $.02&amp;#x2F;gallon to residents, 12 times that price. It&amp;#x27;s now cost effective for any coastal city in America to supply residential water this way.&lt;p&gt;Lots of people still think desalination is still impractical, because it was 20 years ago. They just haven&amp;#x27;t learned about the new tech.&lt;p&gt;The tech:&lt;p&gt;&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.energymonitor.ai&amp;#x2F;tech&amp;#x2F;can-desalination-save-a-drying-world&amp;#x2F;?cf-view&quot; rel=&quot;nofollow noreferrer&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.energymonitor.ai&amp;#x2F;tech&amp;#x2F;can-desalination-save-a-dr...&lt;/a&gt;&lt;p&gt;Residential rates:&lt;p&gt;&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;sfpuc.org&amp;#x2F;accounts-services&amp;#x2F;water-power-sewer-rates&amp;#x2F;2023-rates-frequently-asked-questions&quot; rel=&quot;nofollow noreferrer&quot;&gt;https:&amp;#x2F;&amp;#x2F;sfpuc.org&amp;#x2F;accounts-services&amp;#x2F;water-power-sewer-rates&amp;#x2F;...&lt;/a&gt;</text></item></parent_chain><comment><author>sandworm101</author><text>Residential water is not the issue, not even commercial water.  Desalination still doesn&amp;#x27;t work for the vast majority of users: agriculture.  0.02$&amp;#x2F;gallon is far to expensive when farmers need acre-feet of water (300,000 gallons).  Delivery of such quantities from the ocean to inland farms is also impractical, and cannot conceivably be made so. 
That&amp;#x27;s why they draw from rivers and aquifers.</text></comment>
<story><title>Passive Solar Water Desalination</title><url>https://theness.com/neurologicablog/index.php/passive-solar-water-desalination/</url></story><parent_chain><item><author>joshe</author><text>Advances are always welcome, but it&amp;#x27;s worth noting that desalination works economically right now.&lt;p&gt;In the last 15 years large scale desalination has become practical. It&amp;#x27;s one of the great engineering feats of our time.&lt;p&gt;We can now generate it at scale for less than $.01 per 6.4 gallons. This includes the cost of the electricity, which is about half the expense.&lt;p&gt;San Francisco charges $.02&amp;#x2F;gallon to residents, 12 times that price. It&amp;#x27;s now cost effective for any coastal city in America to supply residential water this way.&lt;p&gt;Lots of people still think desalination is still impractical, because it was 20 years ago. They just haven&amp;#x27;t learned about the new tech.&lt;p&gt;The tech:&lt;p&gt;&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.energymonitor.ai&amp;#x2F;tech&amp;#x2F;can-desalination-save-a-drying-world&amp;#x2F;?cf-view&quot; rel=&quot;nofollow noreferrer&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.energymonitor.ai&amp;#x2F;tech&amp;#x2F;can-desalination-save-a-dr...&lt;/a&gt;&lt;p&gt;Residential rates:&lt;p&gt;&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;sfpuc.org&amp;#x2F;accounts-services&amp;#x2F;water-power-sewer-rates&amp;#x2F;2023-rates-frequently-asked-questions&quot; rel=&quot;nofollow noreferrer&quot;&gt;https:&amp;#x2F;&amp;#x2F;sfpuc.org&amp;#x2F;accounts-services&amp;#x2F;water-power-sewer-rates&amp;#x2F;...&lt;/a&gt;</text></item></parent_chain><comment><author>depressedpanda</author><text>For the international audience who don&amp;#x27;t use freedom units, 6.4 (US) gallons is ~24.2 liters.</text></comment>