* The government’s Department of Trade and Industry gave the UK’s use of coal in 2003 as 68.7 million short tons.¹² One short ton = 2000lb; one ton = 2240lb. 68.7 ÷ 2240 × 2000 = 61.3m tons. The US Energy Information Administration reports that coal provides a 15 per cent share of the UK’s total energy consumption¹³ 61.3 ÷ 15 × 100 = 408.7mt. 408,700,000 ÷ 24,000 = 17,029. In one year, there are 8,760 hours. 8,760 ÷ 17,029 = 0.514.