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redligand t1_jcl1u6p wrote

Reply to comment by Doormatty in If UV radiation is used to disinfect and sterilise things then why isn't everything the sun touches (your skin, the sidewalk etc) sterile? by Critwhoris

Solar disinfection is used effectively in remote communities in the developing world. The effect is amplified by leaving the bottles on reflective surfaces. It's not great and it takes hours but it is effective.

See here for an academic source: https://link.springer.com/referenceworkentry/10.1007/978-3-319-70061-8_125-1#:~:text=Solar%20disinfection%2C%20or%20SODIS%2C%20refers,at%20least%206%E2%80%938%20h.

Wiki: https://en.m.wikipedia.org/wiki/Solar_water_disinfection

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