If we had flown to Oz instead of cycling:

We would each have used the equivalent of 1 1/4 years of carbon releases possible per person in a sustainable society.

We would have used 589kg of fuel per person - equivalent to the release of 5 1/2 tonnes CO2 per person!

We would have used the energy equivalent of the food for 8 people for one year The flight would cost an extra £445 each if the fuel was taxed at the same rate as petrol.