A day after being criticized by Greenpeace for its energy practices, Apple said Greenpeace's estimates for power use at the company's latest data center are much too high. Apple said that its data center now under construction in North Carolina will use about 20 megawatts at full capacity. Greenpeace put the estimate at 100 megawatts. Greenpeace gave Apple, Amazon, and other companies low marks for locating their data centers in areas that rely heavily on coal and "dangerous nuclear." Those companies also scored lower than competitors, including Google and Yahoo, because they disclose less information on energy use. Before publishing its report yesterday, Greenpeace shared its estimate for the power Apple's North Carolina power plant would use based on the size of the investment and size of the facility. Apple (and Amazon) told Greenpeace the number was incorrect but didn't offer a more accurate number.