Why do most lenders not recognize "Green" price adjustments on Energy Efficient / Green Homes by Appraisers ?

Some Lenders pretend to offer "Energy Efficient" Mortgages with expanded ratios for Energy Star & Green Homes ! However , these same lenders will not recognize the "Green" adjustments made by Appraisers vs. non-green & non-energy star homes ! It costs more to build Energy Star & Green ! The benefits are documented by HERS Raters & Green Verifiers and utility cost savings can be calculated by computer programs ! Yet another Green Paradox - we want you to build Green , but it just won't Appraise ! Wake up people ! There are very few Energy Star & Green comparables sold as Resales ! If we can't appraise the ones we build , then how are we supposed to build more ? Is Green only for the wealthy or high downpayment clients ? I hope not ! I'm looking for ideas - What do you think ? Keepin' it Green !