Cost per tonne of CO 2 avoided = ∆T CO per mile, BET -Diesel ∆GHG per mile, Diesel -BET (22) where the numerator accounts for the difference in TCO between BETs and diesel trucks, and similarly the denominator represents the associated emission reduction. We compare this value to the cost of removing a tonne of CO 2 from the atmosphere via direct air capture (DAC) technologies, one of the least efficient and costly alternatives for carbon removal. We should note that our analysis does not include health and mortality costs due to other emissions, mining, smog from trucks, etc.