Scientist warns of major global crisis by 2030 - 19 March 09

One of Britain's leading scientists is warning that the growth of the world's population will reach crisis point by the year 2030.<br /><br />John Beddington, the UK government's chief scientific adviser, says food and water supplies will come under severe pressure as the Earth's population swells to 8.5 billion people. <br /><br />He says the answer is in embracing new agricultural technology.<br /><br />Harry Smith reports.