The DEW Line had a effect on the physical landscape, as new radar stations were being built near the arctic, in order to prevent the Soviet bombers. Geography impacted DEW lines location, as the Soviet Union was quite close to Alaska, so the United States built a system of radar stations to detect any Soviet bombers.
China demanded that Europeans pay for goods with gold or silver because they were not interested in any of European trade items. It was considered as many scholars that silver trade was the mark of starting of global economy.