TransAlta is a power generating company. Co. owns, operates and manages portfolio of assets representing a range of fuels that include water, wind and solar, natural gas and thermal coal. Co.'s Hydro, Wind and Solar North American Gas and Australian Gas, Alberta Thermal, and Centralia business segments are responsible for operating and maintaining its electrical generation facilities as well as the related mining operations in Canada and the United States. Co.'s Energy Marketing segment is responsible for marketing its production, securing fuel supply and deploying its knowledge of power, transmission, environmental products and gas markets to capitalize on opportunities.