Everyone leaves carbon footprints no matter what, but at least he made an effort to raise awareness. He cared enough to get outta his mansion or yacht whatever to get the word out to the world.
Leonardo DiCaprio has the right to spend his hard earned money on houses, yachts or what not. Just like any other human being who buys a house or car. But the time and effort to help out the earth a little by voicing the concern for global warming is amazing. Us humans can never repay earth the damages we’ve made on it, but at least somehow we can try, in any way possible. His way is to warn the world. Kudos Leonardo!