An American company has developed a technique that it says can make bread stay mould-free for 60 days. The bread is zapped in a sophisticated microwave array which kills the spores that cause the problem. The company claims it could significantly reduce the amount of wasted bread - in the UK alone, almost a third of loaves purchased. The technique can also be used with a wide range of foods including fresh turkey and many fruits and vegetables. Food waste is a massive problem in most developed countries.  Bread is a major culprit, with 32% of loaves purchased in the UK thrown out as waste when they could be eaten.