Supply chains for food are time-critical
Before food reaches our plates, it goes through five stages: agricultural production, processing, storage, transportation, and retail. There is a production of greenhouse gases at every stage.
Due to this, all food produced generates greenhouse gases by the time it reaches our plates. In Singapore, 9 million kg of that food is not even sold, so we don't even eat it. It's just food that's thrown away by restaurants. What a waste of energy and resources!