The food system is one of the most successful, most innovative and most destructive industries on Earth. It feeds us, but it is also killing us. The way we eat - how our food is made, processed and sold to us - is damaging our health and the planet. Diet-related disease is now the biggest cause of preventable illness in the developed world, and food production is responsible for a third of global carbon emissions and is the single biggest cause of biodiversity collapse. But it doesn't have to be this way. Henry Dimbleby - former government advisor and author of the acclaimed National Food Strategy - explains what has gone wrong in the food system and what we can do about it. In Ravenous, he and journalist Jemima Lewis offer a vision for a better way, for the sake of our own health and that of our planet.