	Calculator Data The transparency and accuracy of our calculations are very important to us and we have used data from a variety of respected sources which include the Intergovernmental Panel on Climate Change, the Australian Greenhouse Office, the Australian Bureau Statistics, DEFRA and the Greenhouse Gas Protocol.

	Car petrol bill multiplied by 52 or 12 subtotal divided by average price per litre subtotal multiplied by type of fuel figure. The fuel figure is the conversion of petrol burnt to C02, so for every 1 litre of petrol consumed 2.4 kilos of C02 are created. Petrol - x 2.4 Diesel - x 2.7 LPG - x 1.6 Preset Options We have used an assumption of 16,000 km as the average annual distance driven. To get the total we muliply the fuel consumption numbers below by 160 to get litres of petrol consumed per year and then multiply that by 2.4 to get the total. Motorcycle - 5.2/100 Small Car - 7/100 Medium Car - 9.5/100 Large Car - 11/100 4x4 - 13.5/100

	Plane For long distance flights (over 4000 kms) we use the fuel usage figures of a Boeing 747-400 the most common international aircraft used. For shorter journeys (under 4000 kms) we use a Boeing 737-400. Because of the large range of variables with calculating plane emissions there will be some room for error but we try and minimise that as much as possible with the most up to date and extensive calculations. First we work out the amount of fuel burnt per kilometre for both planes. We take into consideration taxiing, holding patterns and the take off/landing cycle. We then times that figure by 3.15 to get the amount of greenhouse gases created. Multiply that figure by 2.7 which is the radiative forcing index. This is the difference the IPCC estimates is the enhanced atmospheric impacts of aviation. This sub total is the planes total effect it's greenhouse gas emissions has per kilometre. We now need to work how much of that each passenger is responsible for. We subtract 8% for cargo. All cargo takes up about 16% of the planes space but of that 8% is luggage for the passengers. Divide this figure by the number of passengers. 168 for the 737 and 416 for the 747. Divide this by 75% which is the average occupancy rates of passenger airplanes. If you're in economy we subtract 10% or if you're in business class we add 50%. This is because of the available floor space on a plane, a business passenger takes up a about 50% times as much space as an economy passenger. Now you have the subtotal of emissions per passenger per kilometre. We simply times this figure by the distance flown on your trip and we have the total.

	House On average, 1 kilowatt of power generated is the equivalent of 1 kg of C02 produced so it's pretty straight forward to work out the emissions from your house or office. In reality each states blend of coal and renewable energy create different amounts of greenhouse gasses so we use the below figures to give an exact total. Tasmania's energy comes from Hydro so you no emissions if you live there. The figures we use are: NSW-0.92 ACT - 0.92 NT - 0.69 QLD - 1.02 SA - 0.95 ViC - 1.34 WA - 1.10 TAS - 0 Aus average - 1

	Event Using flight and car calculations we work out transport emissions. we add 15kg of C02 per hotel room and add 100kg of C02 for the event emissions. Preset Options Small Wedding 20 cars 50km average 4 short flights 6 long flights 10 hotel rooms Medium Wedding 50 cars 70km average 7 short flights 5 Medium flights 6 long flights 35 hotel rooms Large Wedding 70 cars 100 km average 10 short flights 9 Medium flights 8 long flights 50 hotel rooms Interstate Conference 25 cars 100 km average 80 short flights 100 hotel rooms Local Conference 80 cars 125 km average 2 short flights 15 hotel rooms

	Lifestyle We estimate that 150 grams of red meat constitute a meal and that for every kilo of red meat it generates 12.8kg of C02 in it's life cycle. Every litre of waste divide by 8 gives it's weight which we multiply by 3.75 to give C02e emissions. If you recycle we deduct 20% off this figure. For the last question we allocate for <30 = 15 tonnes, <70 = 10 tonnes and <100 = 5 tonnes. Because of the large number of variables in our different lifestyles this total is an educated estimate. We have done our best at accuracy and hope to add more information as it becomes available. Preset Options We use 13 tonnes a year as the Australian domestic average. For couples we double the figures and then reduce that total as resources are shared as a couple and therefore generate less emissions then 2 single people. For 3 person families we assume the third person is a child or dependent and make the necessary reductions to the total.