Bananas are dying. The foodstuff, more heavily consumed even than rice or potatoes, has its own form of cancer. It is a fungus called Panama Disease, and it turns bananas brick-red and inedible.

There is no cure. They all die as it spreads, and it spreads quickly. Soon - in five, 10 or 30 years - the yellow creamy fruit as we know it will not exist. The story of how the banana rose and fell can be seen a strange parable about the corporations that increasingly dominate the world - and where they are leading us.

Bananas seem at first like a lush product of nature, but this is a sweet illusion. In their current form, bananas were quite consciously created.