For the purpose of providing funds for use in this state for the protection of the environment through the control of water pollution, as authorized by Section 37(b) of Article III of the Constitution of the State of Missouri, the board of fund commissioners of the state of Missouri is hereby empowered to borrow, on the credit of the state, the sum of twenty million dollars in the manner provided in sections 644.500 to 644.560. The bonds shall be issued by the state board of fund commissioners from time to time and in such amounts as may be necessary to carry on a program by the clean water commission of the state as determined by the general assembly for the planning, financing, and constructing of sewage treatment facilities by any county, municipality, sewer district, or any combination of the same.