NACFE’s From Source To Highway: The Messy Middle Emissions Report focuses on greenhouse gas and criteria emissions based on analyzing data from the 14 trucks that participated in Run on Less – Messy Middle.

The report found that no longer can the environmental footprint of a heavy-duty vehicle be assessed solely by the composition of gases exiting its tailpipe. Instead, a comprehensive accounting requires a well-to-wheel perspective that integrates the well-to-tank emissions generated during energy production and distribution with the tank-to-wheel emissions produced during vehicle operation.