Question

(5 points) The worlds energy consumption by energy source from the year 1990 to 2012 is shown below (Source: US EIA website): 1. HistorY 2012 250 200 Liquids 150 Coal 0 100 Renewables 50 1990 2000 2012 a) Based on the above data, estimate the average annual percent (%) increase in coal energy consumption rate between 1990 and 2012 The worlds coal reserves were estimated to have a total heating value of 25,000 EJ (at the year 2012). Estimate the life time of coal reserve, assuming that our annual energy consumption rate increases at the same rate as you calculated in part (a) b)

a).Based on the above data, estimate the average annual percent (%) increase in coal energy consumption rate between 1990 and 2012.

b) The world’s coal reserves were estimated to have a total heating value of 25,000EJ (at the year 2012). Estimate the life time of coal reserve, assuming that our annual energy consumption rate increases at the same rate as you calculated in part (a).

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