General Motors has committed to using electricity solely from wind, solar or biogas for all of its 350 operations in 59 countries around the world -- within the next 34 years.
CEO Mary Barra says it "helps us better serve society by reducing environmental impact."
The automaker says it used about 9 terawatt hours of electricity in 2015 to build its vehicles and power its offices, technical centers and warehouses globally. A terawatt equals a trillion watts.
Currently, GM is using only a tiny fraction -- 125 megawatts by the end of this year -- to power some of its operations. So realizing the goal will be a huge leap.
The company says it anticipates costs to install and produce renewable energy will continue to decrease.
Michigan utilities currently provide 10% of the state's electric needs with renewables, primarily wind.