West Australian: Climate change adviser Ross Garnaut has recommended a modest plan to cut greenhouse gas emissions that will push up power prices by 40 per cent and petrol by 5¢ a litre by 2020 but which he concedes will not be enough to save Ningaloo Reef from the ravages of global warming. Launching his economic modelling of the impact of climate change yesterday, Professor Garnaut said Australia should aim for a 10 per cent cut in greenhouse gas emissions below 2000 levels by 2020 as part of an …