In the most basic terms, sustainable use is the legal killing of animals for food, clothing, and the like. There's more of it out there then one might think. Chickens, cows, pigs, ostriches, and turkeys are all slaughtered for food and to make leather. Kangaroos are slaughtered for dog meat and consumption. Emus and ostriches are killed for their oils and also for consumption. And of course, there is legal killing of snakes for clothing. Just imagine how many snakes you'd have to kill to make it. That's a lot of snakes killed. Also, there has been news of crocodiles being farmed to use for clothing. Just for clothing, nothing more. Is this really necessary? Why would people pay thousands of dollars to wear dead animals? It would be considerable less expensive and probably more humane just to pick up roadkill. Maybe this is a graphic description, but it's the same basic principle. Like many of my friends, I watch The Crocodile Hunter on TV and I'm very much impressed about his passion for wildlife. He has said many times that he doesn't like sustainable use. And of course, that means the government doesn't like him. But don't believe what you hear. He is committed to the conservation of wildlife, and maybe when you really take the time to admire wildlife then you can see why he cares so much about preserving it.