carbon calculator clone script needed

we need a carbon calculator to calculate carbon dioxide consumed on 1) flights, 2) driving habits, and 3) home energy use. this should be able to look up by zip code to determine what % of energy is consumed by coal, oil, etc. and be able to calculate on a per KW/H usage pattern to determine approximately how many lbs of co2 is consumed by a household. please visit any carbon offset site to get an idea of what is needed here. we need the calculator only, not the clone of the whole site. go to [login to view URL] and check out the calculator to get an idea of the calculator we need.