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Continue to ChatSODIS Method Makes Safe Drinking Water in Six Hours https://cleantechnica.com/2011/07/07/sodis-method-makes-safe-drinking-water-in-six-hours/
SODIS Method Makes Safe Drinking Water in Six Hours https://cleantechnica.com/2011/07/07/sodis-method-makes-safe-drinking-water-in-six-hours/