 As I said in Leonardo DiCaprio's environmental documentary, The Eleventh Hour, the problem is not a problem of technology. The problem is not a problem of too much carbon dioxide. The problem is not a problem of global warming. The problem is not a problem of waste. All of those things are symptoms of the problem. The problem is the way that we are thinking. The problem is fundamentally a cultural problem. It's at the level of our culture that this illness is happening.