In Australia, food waste is a big problem, costing the economy about $20 billion each year. This means that around 7.3 million tonnes of food are wasted, which is about 300 kg per person or one out of every five bags of food. Food waste is also a major source of greenhouse gas (GHG) emissions. If food waste were a country, it would be the third-largest emitter of GHGs after the US and China. In Australia, food waste makes up more than five...