AAP: Economist Ross Garnaut will fuel the debate about short-term greenhouse gas targets when he releases the latest stage of his climate change report. His presentation to the National Press Club at lunch time on Friday will also provide the first glimpse of Treasury modelling on the economic impact of emissions reductions. Environmentalists are urging Prof Garnaut to back deep emissions cuts by 2020 to be part of a global effort to avoid catastrophic climate …

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