Desuden ville vi sandsynligvis kunne forbedre 25-50 % af vores luftkvalitet - i det mindste i mange områder - hvis vi ville satse mere på kombineret trafik, altså en kombination af jernbane, landevej og vandvej.
If, moreover, we were to achieve - as is probable - an improvement of between 25% and 50% in our air quality - at least in quite a few areas - we should be setting our sights more firmly upon combined transport, that is to say on a combination of rail, road and water.