getting a reading on each figure is pretty simple math... more seems better in this case (at least to me). I don't have natural gas, but think that would be of interest to many posters in cold climates.... I think an awesome addition would be adding in some sort of "tons of CO2" produced, but would require that people know what sort of energy mix their utility uses.... and would add complication on the server side -but would ultimately be the best level upon which people could "compete" as a kwhr made from wind just isn't the same as a kwhr made from coal.
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