; (B) a qualified cogeneration facility; (C) any generator that produces useful thermal energy output with a rated fuel-based capacity of at least 30,000,000 British thermal units on a higher heating value basis per hour, but less than 50,000,000 British thermal units on a higher heating value basis per hour; or (D) any other entity that produces or delivers useful thermal energy output the production or delivery of which results or may result in greenhouse gas emissions if the Administrator determines that reporting under section 713 by such entity will help achieve the targets specified in section 702. (16) Useful thermal energy output The term useful thermal energy output means thermal energy as measured in million British thermal units on a higher heating value basis produced by a generator that produces thermal energy net of the energy in inlet combustion air, feedwater, or any other fluids not used as fuels of combustion. 702. Reduction targets for covered entities (a) In general The regulations issued under section 729 shall establish enforceable targets for the greenhouse gas emissions of covered entities, such that— (1) in 2030, the aggregate quantity of greenhouse gas emissions from covered entities does not exceed 60 percent of the aggregate quantity of greenhouse gas emissions from covered entities in 2019