Is anybody denying that? I found a study by Mikhail Chester and Arpad Horvath suggesting that total life-cycle energy inputs and greenhouse gas emissions contri

Is anybody denying that? I found a study by Mikhail Chester and Arpad Horvath suggesting that total life-cycle energy inputs and greenhouse gas emissions contribute an additional 63% for onroad, 155% for rail, and 31% for air systems over vehicle tailpipe operation. However, even than rail generally appears to be less damaging than air by far. What are your sources?