Hi Mary,
I did check out one of the Carbon footprint calculators you listed - an interesting activity ( checking bills and usage of energy like propane and pellets). The first part involved activities and decisions that were personal choices (food, clothing, car, etc). What was interesting to me were the items in the second part of the equation like insurance costs ( pet, house and car). The items in part 2 were largely 'unseen' impacts and these racked up the largest score for the Footprint calculation.
Adell