Most energy used in the U.S. is produced from coal. There are 315,000,000 people in the U.S. It is estimated that one person is responsible for using 2000 lbs of coal per year. For every 100 lbs of coal burned, 2.5 lbs of sulfur go into the atmosphere. How much sulfur is put into the air by coal burning each year for all the people in the U.S.?