As Christmas and New Years celebrations come to an end, people often look to their habits in order to improve their lifestyles. There is one statistic in particular that might make us think when it comes to tidying up after the festivities: roughly one third of the food produced in the world for human consumption gets lost or wasted every year. This equates to approximately 1.3 billion tonnes, according to the UN's Food and Agriculture Organisation (FAO) - equivalent to more than half of the world's annual cereals crop.