Travel and flying are here to stay -- but we need to do them responsibly. In conversation with TED's head of curation Helen Waters, Virgin Atlantic CEO Shai Weiss shares three steps the aviation industry needs to take to achieve its pledge to be net-zero by 2050 and discusses what you can do to shift airlines towards sustainability. "We have a 2050 goal, but actions need to be taken right here, right now," he says.