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posted ago by Mad_Hattie ago by Mad_Hattie +74 / -0
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– deleted 3 points ago +3 / -0
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– The_Emperor 2 points ago +2 / -0

I knew UV = disinfectant decades ago.

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– BuckyRancher 2 points ago +2 / -0

UV light has been used to disinfect sewage for more than 20 years.

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