en: If, on the other hand, we calculate the benefits that better air quality will bring to people and the natural environment, as well as to buildings, we see that the economic benefits are four times greater than the costs.
el: Θα πρέπει ωστόσο να ειπωθεί ότι υπάρχει πολύ μεγάλη υπερβολή ως προς τις εν λόγω δαπάνες.