Through the savings, the guaranteed savings: there is a reduced energy bill that is associated with the project. You invest $100 in the energy efficiency of a building and there are guaranteed savings of 15% to 20%, as I said, and it's that income flow for the period of the contract that is used to pay off that initial $100 investment. After the end of the contract, those energy savings accrue to the building owner.
It's using the savings during the contract period to pay for the initial capital. When the contract period is over, typically these measures are lasting 15, 20, 25 years, so that's when the government would have those savings.