Australian: ROSS Garnaut’s 537-page blueprint for a national trading scheme was inspired by pure economic theory. Climate Change Minister Penny Wong has opted for 516 pages of pure political pragmatism. Garnaut’s draft report two weeks ago was a black and white description of his vision for the scheme. Wong hastens slowly. Her more cautious approach emphasises the need for an early start but a gradual transition. It shepherds ideas forward but commits to few of them, …