1. Earth’s Changing Environment Lecture 6 Global and US Energy Consumption and Production

2. The QBtu Best energy unit for global scale is quadrillion Btu (QBtu) 1 QBtu = 1x10 15 Btu A Btu = British Thermal Unit

3. World Primary Energy Consumption (QBtu) Global 403 US 97 Western Europe 73 China 40 Russia 28 Japan 22 (2001 values)

4. Example Problem 1 Compare the per capita energy consumption in the US with per capita energy consumption in China. US: 97 x 10 15 Btu/ 284x10 6 = 342 million Btu China: 40 x 10 15 Btu/ 1.29x10 9 = 31 million Btu

5. Global Energy Consumption (QBtu) Petroleum 156 (39%) Coal 96 (24%) Natural Gas 93 (23%) Hydro 27 (7%) Nuclear 26 (6%) Renewables 5 (1%)

6. US Energy Consumption (QBtu) Petroleum 38 (39%) Coal 22 (23%) Natural Gas 23 (24%) Nuclear 8 (8%) Hydroelectric 3 (3%) Renewables 3 (3%)

7. Example Problem 2 Annual hydroelectric energy consumed in the US equals 209 billion kWh Convert this value to Btu, using the conversion factor: 10,400 Btu/kWh 2.09x10 11 kwh x 1.04 x10 4 Btu/kWh =2.2 x10 15 Btu = 2.2 QBtu

8. Primary Energy in QBtu Production (Consumption) prod (cons) Global 403 (403) US 72 (97) Western Europe 45 (73) Japan 4 (22) China 38 (40) Russia 45 (28) Saudia Arabia 20 (5) Venezuela 9 (3) (2001 values)

9. Fossil Fuels Coal, Natural Gas, and Oil are fossil fuels and are the source of 85% of the primary energy used worldwide. There is a finite supply of these resources. Oil, the most heavily used fossil fuel, has the most limited supply

10. US Sources of Energy (QBtu) 56% of oil consumed in US is imported 86% of US energy consumption is fossil fuels.