The energy savings helped reduce the carbon dioxide emissions considerably, Vacon writes in a press release. This corresponds to the amount of energy produced by approximately eight 700-MW nuclear power reactors in a year.Also, the amount of energy produced from renewable energy sources with Vacon's AC drives was approximately 18 TWh.In addition, in 2011, the amount of energy produced from renewable energy sources with Vacon's AC drives was approximately 18 TWh. Producing an equivalent amount of energy using coal would generate about 16 million tons of carbon doxide.An AC drive adjusts the speed of an electric motor according to the real process need, which typically reduces energy consumption by 20-50 percent.