Attenborough's right that sending flour doesn't fix the problem. Those folks out in the desert in the Horn of Africa live on the edge of sustainability and it takes very little (be it a bad harvest, or most likely a bloke with an AK47 who nicks your cows then steals the flour from the warehouse) to tip the balance over to famine.
It's not strictly down 100% to the environment (Las Vegas seems to do OK and that's also in the middle of a desert) but that's most of the problem. They skate on very thin ice. Not their fault at all, one is born where one is born, we don't get to choose. It sucks.
It will come to a head and it won't be pretty.
Yeah I'm with you on this.
I have a hunch it's simply not possible for everyone in the world to live how most of us live. There's just not enough resource, be it wood or water or land or oil or whatever, to go around.
The only possible answer I see is in technology, perhaps there's a break through yet to be found, perhaps we'll be able to irrigate the desert and find limitless energy and so on. Or perhaps not. I don't know. But if not, at some point it's going to get messy.
Obviously anybody deeply troubled by what they consume has the option of stopping. It won't be noticed though.