Would someone PLEASE explain how the earth 'warmed' after the ice age the scientists advise we had. ....when there were not 7 million people around burning up hydracarbons. Seems to be a very simple and basic factor which needs to be explained and one which is based on 'history' and not one of hypothetical spin. Seems to me Tony Abbott and crew would win over many with such a question to scientists and Gillard Government. Carbon Tax is a tax on air.