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Shipping might have thought it was out in the clear post-Paris and COP21, but there are still plenty of bodies around the world targeting maritime emissions. The latest to lend heft to the argument in favour of carbon taxes is the International Monetary Fund (IMF). In a report out yesterday, the IMF said carbon taxes should be levied against both shipping and aviation.

IMF reckons up to $25bn could be raised from a tax on aviation and shipping fuels, which would help developing countries adapt to climate change.