Pop-up graphic providing quantitative information associated with exchanging diesel buses with CNG buses. For each measure included in the decision-support tool (see Figure 1), a pop-up graphic provided quantitative information when a user clicked on the icon in the column ‘quant. info.’ These graphics provided greater detail than was possible to provide on the main page of the decision-support tool, in this case shown for the measure – exchanging conventional diesel buses with CNG buses. DOI: https://doi.org/10.1525/elementa.126.f2