Liver, lungs, heads, tails, kidneys, testicles, all of these things which are traditional, delicious and nutritious parts of our gastronomy go to waste.

In Japan, Taiwan and South Korea, the government in a matter of years has put a lot of energy behind recycling food waste as livestock feed. It's environmentally friendly, it provides cheap livestock feed for the farmers in those parts of the world, and it avoids sending the food waste to landfill.

The job of uncovering the global food waste scandal started for me when I was 15 years old. I bought some pigs. I was living in Sussex. And I started to feed them in the most traditional and environmentally friendly way. I went to my school kitchen, and I said, 'Give me the scraps that my school friends have turned their noses up at.'

Heartless though it may seem to some, among the least harmful things to eat are sustainably culled wild animals. In the absence of natural predators, deer populations in parts of Britain have reached such dense numbers that the woodlands they browse fail to regenerate.

It's certainly sobering to think that British consumers waste roughly a quarter of the food we buy. Or to put it another way, we funnel £12 billion a year from the supermarket through to our rubbish tips, costing each household an average of £480.

In the United States, under 3 percent of municipal food waste - so that's the food scraps that goes into people's garbage cans - actually gets recycled. If you go to a place like South Korea, the exact reverse is the case. It's about 3 percent that doesn't get recycled.