"More and more, our customers want us to lead," Nassetta, the chairman of WTTC, said at its annual summit here. "We must take collective action because ensuring life-changing travel experiences for the billions of travelers we will welcome during the golden age of travel also requires us to be great environmental stewards of the communities where we operate." Hilton has been doing its part, he said, by reducing its carbon emissions by 24% since 2009. Still, he acknowledged, "We can do a lot more." "We're committing to releasing ambitious science-based targets to reduce greenhouse gas emissions," he said. "We know it's going to challenge us. It certainly isn't going to be easy, but it's going to hold us accountable for the work we do to make this world a better place." Get the full story at Travel Weekly