We keep putting on programmes about famine in Ethiopia; that's what's happening. Too many people there. They can't support themselves - and it's not an inhuman thing to say. It's the case. Until humanity manages to sort itself out and get a coordinated view about the planet it's going to get worse and worse.
We only know a tiny proportion about the complexity of the natural world. Wherever you look, there are still things we don’t know about and don’t understand. [...] There are always new things to find out if you go looking for them.