Nisource Incorporated. The Group's principal activity is to provide natural gas, electricity and water to the public for residential, commercial and industrial use. The Group operates in six segments. Gas distribution provides natural gas to residential, commercial and industrial customers. Electric operations generate and distribute electricity. Gas transmission and storage operations provide for the transportation and storage of natural gas. Exploration and production operations produce natural gas and oil. The other products and services segment participates in real estate, telecommunications and other businesses. Gas distribution accounted for 45% of 2002 revenues; Electric, 17%; Gas transmission, 16% ; Exploration and production, 2% & Other, 20%.