Coal
Production of coalData on the production of hard coal and brown coal are given in Etemad et al. (1991) on a country basis, for the period 1800 - 1980, completed with data from Mitchell (1992, 1993, 1995) to 1990. They have been aggregated into regions and converted into coal equivalents. Following Etemad et al. (1991) a conversion factor of 1.0000 for hard coal and 0.3385 for brown coal was used for countries were no factor was given. When a range was given for a country the average value is used. A second conversion was made into metric tons of oil equivalents using the following ratio: 1 metric ton of coal equivalent = 0.7 metric ton of oil equivalent (IPCC/OECD, 1993).
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