A carbon footprint calculator. If I put in Iowa it calculates at 36 for an detached house with two. The same information input for Idaho including several extra bedrooms from our house out there comes up with a score of 11 . The national average according to Nature conservancy is 53. Carbon Footprint Calculator What's My Carbon Footprint? I have no doubt we all create some pollution. Some more than others. I object fully to making pollution a profit scam.