It looks like I will have the opportunity to add a few (probably only 5) questions to a questionnaire to get an indication of the persons carbon footprint. The questions I am think of are:
1) How many individual aircraft flights have you taken in the last year? (A return trip counts as 2, a return with a stop off would be 4).
0, 1-2, 3-4, 5-8, 8+
2) On how many days in the last week did you travel by private car?
0, 1, 2, 3, 4, 5, 6, 7
3) On how many days in the last week did you travel by ground based public transport (bus, train, tram)
0, 1, 2, 3, 4, 5, 6, 7
3) On how many days in the last week did you eat meat?
0, 1, 2, 3, 4, 5, 6, 7
4) Do you live in a flat/apartment or in a house?
This would be aimed at people in Edinburgh but might work in other developed world areas. The intention is not to produce a personal carbon audit for the individual but to produce a measure for correlation with other measures.
The flat vs house is an attempt at getting a heating/cooling estimate without resorting to asking about thermostat settings etc. Very generally apartment living is less impactful than house living and includes elements of transport/delivery, garbage etc.
These questions need to be answered in under about a minute and without opportunities for prevaricating.
Am I re-inventing the wheel here? Is there something out there already that does a similar job?
Are there better questions I could ask?