Australian: KEY independent Tony Windsor has expressed concern about the impact of a carbon price on the cost of food. Mr Windsor has joined Julia Gillard’s top-level climate change committee. As the Prime Minister announced she would chair the committee herself with “all options on the table” to find a consensus – including a carbon tax, an emissions trading scheme or a hybrid of both – Mr Windsor said the impact of a carbon price on food prices was at the top of his concerns. “We …