Turns out we can use carbon dioxide for something after all. We can use it to help filter and purify water.
There maybe no water too dirty for this tech to work and it low energy.
Maybe we should be sending every poor person on earth a cheap way to clean water. We could do an end run around the politicians and other forces that be that try to block this.
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https://www.princeton.edu/news/2017/05/08/invention-produces-cleaner-water-less-energy-and-no-filter
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LifeStraw Go Water Filter Bottle with 2-Stage Integrated Filter Straw for Hiking, Backpacking, and Travel
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