TAPPER: President Trump has gone after you directly when talking about this issue of climate change. I want you to -- I want to give you an opportunity to respond to something he said... <i> TRUMP: Al Gore wants to eliminate the combustion engine, essentially, and flies around the world on jets and pushes plans that would help create China, make it stronger...</i> TAPPER: This is a criticism we hear from conservatives all the time when talking about people like you or Elon Musk or Leonardo DiCaprio, that you, yourself, have a large carbon footprint. GORE: Yes. Well, I don't have a private jet. And what carbon emissions come from my trips on Southwest Airlines are offset. I live a carbon-free lifestyle, to the maximum extent possible.