A storm brews over food, water & power

As the world's population grows, competition for food, water and energy will increase. Food prices will rise, more people will go hungry, and migrants will flee the worst-affected regions.
That's the simple idea at the heart of the warning from John Beddington, the UK government's chief scientific adviser, of a possible crisis in 2030.
http://news.bbc.co.uk/1/hi/sci/tech/8213884.stm