Tristram Stuart

It feels like an easy sum to gauge the balance between forests and, say, the proliferating free newspapers that litter our public transport. This noxious combination of words and paper represents a clear-cut crime against the biosphere.

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.'

It doesn't have to be a mountain you have to be climbing. I hope to change people's opinion about Saudi in general and Saudi women and Saudi women's opinion about themselves. I really hope they can step out of their comfort zone and just dream: try to push your limits.

Mushrooms are miniature pharmaceutical factories, and of the thousands of mushroom species in nature, our ancestors and modern scientists have identified several dozen that have a unique combination of talents that improve our health.