A new report by the Institution of Mechanical Engineers estimates that globally 30-50% of food is wasted. (Download the report.). In the following video Trstram Stuart, author of the 2009 book, Waste: Uncovering the Global Food Scandal, tackles the subject. Writing in the Financial Times Tristram quoted Lord Haskins, then one of the chief advisers to the government on food and farming, as estimating that 70% of food produced in Britain is wasted. This is obviously a striking example of market efficiency.