CEMIG SA -ADR is active in the generation, transmission, distribution and commercialization business, Cemig continues to invest in the expansion of its services and in new technologies so as to remain a top notch company nationwide. Using power sources such as hydraulic, thermal, wind and solar power and even other more advanced technologies, such as hydrogen fuel cells, Cemig goes on providing, under any circumstances, alternatives for the supply and commercialization of electric energy.