When is water safe to drink? – Mia Nacamulli

View full lesson: https://ed.ted.com/lessons/when-is-water-safe-to-drink-mia-nacamulli Water is refreshing, hydrating, and invaluable to your survival. But clean water remains a precious and often scarce commodity – there are nearly 800 million people who still don’t have regular access to it.


 

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