One past estimate of future oil production shows so-called peak oil, the maximum production
worldwide of crude oil, having been reached during 2015 at a level of approximately 95 million
barrels per day.
a) The United States currently consumes approximately 20,000,000 barrels per day of oil. The
population of the United States is approximately 300 million and the population of the world is
approximately 6 billion people. Calculate how many million barrels of oil would be consumed
worldwide if the world were consuming oil at the same rate as residents of the United States.