... that was affected was road builders. Before now the road system wasn't that good because there was no need for it. But after a lot of money was spent on building new roads and repairing and improving old ones. The oil was used in the engines of the cars but even more importantly in the making of petrol. With this America now produced 32 percent of the total world products in 1913. This was more than Britain and Germany put together. In 1929 this increased to 46 percent. This was due to America having so much raw materials. Because of this new mass production prices fell form $760 in 1908 to $260. This made the car available to a lot more increasing sales and so profits. The car wasn't only new product to be invented, mass-produced and sold. Now radios became extremely popular. When the first broadcast went out in 1920 ...

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