Why CO₂ footprint = 5.4 tons? What's 2000 level?

Some other ecological footprint calculators:
www.ecologicalfootprint.com/
www.ecologicalfootprint.org/Global%20Footprint%20Calculator/GFPCalc.html

Brick not efficient.
conscience -> conscious
World average = 6.9/4.9
Bangladesh 164 M. footprint PDF

Other CO₂: cooking/burning, breathing/exercise. 3,780 -> 21,600

Naperville cost:
9 cents/KWH
$40/400 CF = 10 cents CF(7.5 gal)= 1 cent/gal (low-flush=1.6 gal/3.5 gal. Pressure-assist 1 gal.)