IBM saved $43 million in energy expenses last year, conserving 378,000 MWh of electricity and 326,000 million BTUs of fuel oil and natural gas through hundreds of conservation projects, according to the company’s 2011 corporate responsibility report. IBM’s energy conservation projects saved the equivalent of 7.4 percent of its total energy use, surpassing its corporate goal of 3.5 percent. These projects also avoided 175,000 metric tons of carbon dioxide emissions.