Courier Mail: AT least Ross Garnaut was honest about the cost to our greatest natural treasure in his recent report on greenhouse gases. Saying that Australia should initially aim for a global consensus to stabilise greenhouse gases in the atmosphere at 550 parts per million, he was brutally frank: “The 550 strategy would be expected to lead to the destruction of the Great Barrier Reef and other coral reefs.” The Australian and Queensland governments have always avoided this point when …