Agence France-Presse: Parents who have more than two children should be charged a lifelong climate change tax to offset the effect of their extra greenhouse gas emissions, an Australian medical expert has proposed. They should pay 5,000 dollars (4,400 US) a head for each extra child and up to 800 dollars every year thereafter, according to the plan published in the Medical Journal of Australia. In contrast, contraceptives and sterilisation procedures would be eligible for carbon credits, suggested …