麻豆约拍

The use of precious water in industry and farming is rising up the business agenda. Should people eat less beef - saving the large amounts of water used in its production chain? Lesley Curwen talks to the man who invented the concept of 'virtual water', Professor Tony Allan.

Plus, John Temple, Research Sustainability Director at Unilever explains what the company is doing to measure the water used in making its own products.

And from Kenya, our regular commentator Wycliffe Muga looks at one business project which helps remote villages get better access to clean, safe water.