Gửi tin nhắn: A comparative life-cycle energy and emissions analysis for intercity passenger transportation in the U.S. by aviation, intercity bus, and automobile /Haobing Liu Graduate Research Assistant a, ⇑ , Yanzhi ‘‘Ann” Xu Ph.D. Research Engineer II a , Nicholas Stockwell Engineer b , Michael O. Rodgers Ph.D. Principal Research Scientist and Adjunct Professor a , Randall Guensler Ph.D. Professor a