Why does Plume Plotter model incinerator pollution? Why not measure it directly?

How do we know that Plume Plotter's predictions correspond to the pollution in the real world?

Who else relies on modelling incinerator pollution instead of measuring it?

How do we know that Plume Plotter's modelling is correct?

For most incinerators that Plume Plotter has modelled, the modelling results done by the developer are also publicly available. This document compares Plume Plotter's prediction of the annual mean fallout of nitrogen dioxide with the developer's prediction, for several incinerators. The predictions are generally very similar, even though the modelling uses different weather data and sometimes different software (AERMOD vs. ADMS). This agreement suggests that both were done correctly.