Complex sentence: The Gaborne region accounts for over 75% of water demand in eastern Botswana, and the local Gaborone Dam and Bokaa Dam cannot meet the growing demand even with reclamation from the Gaborone Water Treatment Works at Glen Valley.
Split into simpler sentences: The Gaborne region accounts for over 75% of water demand in eastern Botswana. The local Gaborone and Bokaa dams cannot meet the growing demand even with the help of reclamation from the Gaborone Water Treatment Works at Glen Valley.