As the United Nations World Food Summit came to a close yesterday, some delegates criticised the event for doing too little to end world hunger and put tight controls on the development of biotechnology in agriculture. Some 1000 organisations were represented at the World Food Summits, with 74 heads of state or government and 6,613 participants in attendance. Critics said the delegates' pledge to reduce the number of hungry people in the world to 400m by 2015 did not go far enough, as it simply reiterated the pledge made at a similar summit as long ago as 1996 - since when the number of hungry people has not decreased.