What happens after we flush? Sanitary engineers might just be the unsung heroes of civilisation, ensuring the safe disposal of waste water and assuring a supply of safe drinking water.

Host Guru Madhavan gets his hands dirty, discussing sanitation systems with:

Pam Elardo, former Deputy Commissioner for New York's Bureau of Wastewater Treatment

Andrew Russell, science historian and Provost at Suny Poly

New episodes - conversations about how to rebuild the world better - every other Friday.

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