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The challenge of creating a global low-carbon society is examined from the perspectives of a slow-growing but highly developed economy (Canada) and a fast-growing developing economy (China). Both countries' responses are compared to a similar carbon price schedule (US$10/tCO2e in 2013 rising exponentially to $100 by 2050) using a hybrid technologically explicit and behaviourally realistic model with macroeconomic feedbacks (CIMS). Then additional measures are imposed based on the national circumstances of each country; for Canada we simulate a 50% reduction by 2050, and stabilization for China. The scale of the challenge in all cases requires that every available option be vigorously pursued, including energy efficiency, fuel switching, carbon capture and storage, and accelerated development of renewables; to compensate, there are significant co-reductions of local air pollutants such as SOx and NOx. Finally, the abatement cost schedules of China and Canada are compared, and implications considered for carbon permit flows if the cost schedule of the rest of the developed world is assumed to be similar to that of Canada. We found that the developed world and China could collectively reduce emissions by 50% in 2050 at a price of $175/ tCO2e, with permits flowing from the developed countries to China; while abatement costs are lower in China up to $75/t, at higher prices reductions are less costly in the developed world. Our results indicate that a global low-carbon society is feasible, on condition that policy makers are willing and able to impose long-term, credible policy packages with carbon pricing policy as the core element, coupled with supplementary regulations to address market failures. [ABSTRACT FROM AUTHOR]