BBC Science in Action: Energy, Water and Food

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Radio programme from the World Service

Global efforts to try and improve energy, water and food supplies are becoming increasingly necessary. But they are being dealt with on an individual basis where they should be solved in an integrated manner according to Professor Michael E. Webber, deputy Director of the Energy Institute at the University of Texas at Austin in the US.

Clever Desalination
Solar-powered desalination is one way of reducing the huge energy costs of getting fresh water from sea water. But the waste product – salt - is still environmentally damaging. A new idea is to use more solar power to treat the waste magnesium salt and turn it into an alkaline that can be used to reverse the acidification of the oceans caused by increasing levels of carbon dioxide in the atmosphere.