Two iconic cities in China and the U.S. are spearheading sustainability and revolutionizing the way people get around in a densely populated urban environment. What initiatives have been put in place? How can exchanges among global cities bring about cleaner, more livable cities? In this edition of Green Talks with Mayors, CGTN's Wang Guan spoke with Dai Jintao, vice mayor of the Shenzhen Municipal People's Government, and Nancy Sutley, vice mayor for Energy and Environment for the City of Los Angeles, to discuss how innovation and technology foster sustainable urban development and provide a template for the cause of carbon neutrality worldwide.