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In a week of headlines about water shortages slowing ships in the Panama Canal and drought in India's Silicon Valley, we look at unexpected ways to manage the world鈥檚 water.

Presenter Marnie Chesterton and panellists Chhavi Sachdev in Mumbai, India, and Meral Jamal in Nunavut, Canada, tell stories of innovative ideas being tried in their parts of the world.

Marnie meets water detective Barbara Sherwood Lollar, professor in earth sciences at the University of Toronto, to hear how ancient water can help us plan for the future. Plus, how submersible speakers can help corals, and stories of living underground.

Producer: Dan Welsh with Tom Bonnett, Harrison Lewis, Jack Lee, Katie Tompsett and Emily Preston.