Study: Recipe tips and advice could help reduce household food waste by a third Content by subject If you already have an account please use the link below to sign in. If you have any problems with your access or would like to request an individual access account please contact our customer service team. Food waste is a major contributor to global greenhouse gas emissions Hellmann's commissioned research explores how households can take steps to help tackle the 900 million tonne global food waste mountain Setting aside just one day a week to make a meal using solely ingredients already present in the kitchen could slash household food waste by a third, a new study has found - indicating that encouraging small behavioural changes can make significant inroads into shrinking the world's food waste mountain.