The total electrical generating capacity of the United States was about 1,039,137 MW in December 2011. Assuming there will be a need for an additional 160,000 MW of capacity in the next 10 years. How many new plants of the size of the system in P1.15 (1000 MW) will be required? If half of these plants are coal-fired, how many tons of coal will be required per year for the new plants, and how many tons per year of ash and SO2 will have to be handled in 2022, assuming continuous operation at full capacity?