Hydrogen may be the fuel to help the United States to a non fossil energy source. Although hydrogen may not be widely used as a fuel until after the turn of the century, special applications may become feasible in the short term. Costs, uses, safety, and production methods are discussed. (BT)

The technique of intermittent control systems for air quality control as developed and used by the Tennessee Valley Authority is investigated. Although controversial, all Tennessee Valley Authority sulfur dioxide elimination programs are scheduled to be operational this year. Existing or anticipated intermittent control systems are identified. (BT)