VANCOUVER — Global action on climate change is set to kick off a clean-energy revolution, which could rewrite Canada’s economy. This is one key finding in the fourth and final instalment of the Fifth Assessment Report from the Intergovernmental Panel on Climate Change released today from Copenhagen, Denmark. The report will inform world leaders as they prepare for the UN summit on climate change in Lima, Peru, in December. It focuses on global changes needed to protect human security, economic prosperity and food production from the impacts of climate change and extreme weather.