This free course was written by Björn Claes and Rob Moore.
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Figure 3: Department of Transport, Transport Statistics Great Britain, December 2016. Reproduced under the terms of the OGL, www.nationalarchives.gov.uk/doc/open-government-licence.
Figure 4: International Chamber of Shipping, Shipping, World Trade and the Reduction of CO2 Emissions United Nations Framework Convention on Climate Change (UNFCCC), 2014.
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