For a high rise project the client is considering investing in micro-turbines to generate electrical power on site from natural gas. The utility company will provide the fuel at a reduced cost to encourage the private micro-turbine use. With this reduced fuel cost (the utility's modified rate) the energy model saves a significant percent of the operating cost for the overall building energy use. This seems to be a win-win option for larger buildings, and can support LEED points in the EAc1 credit.