I'm at 6 earths. Although the housing questions were totally irrelevant. What in the hell is winter? Why would I want insulation? Why would I weather proof? And why should I be worried about water? I will cut down on meat though. That's a decent suggestion.
I'm also pissed that I'm being grouped with the coal states.
Interestingly, small apartments here are worse for the environment than big old houses. The former need air conditioning, my big old louvred place doesn't. New houses tend to be worse than old houses too.
If you cared enough, you could enter about 45% for renewable sources for your electricity and that'd punt the carbon factor of your electricity use down to about what the NT's grid *actually* is.