To persuade his audience Paul Bogard uses a cause and effect structure. He builds the argument of people not giving dark light the credit it deserves early in the selection . Bogard uses some of his experiences as a way to connect with the audience . He states " Today,though, when we feel the closeness of nightfall, we reach quickly for a light switch . " This applies to many of the audience and makes them re-think the way they see darkness. By Bogard using numbers and dates he is more likely to be credible. " NASA photographs, show that what was a very dark country as recently as the 1950's is now nearly covered with a blanket of light " . This statement not only does it have a specific date but it also gives a company name. Bogard
