6.1 Fossil Fuel:Fire and Combustion
6.1.1 Fuel Mining, Refining
6.1.2 Combustion Process
6.1.3 Safety, Health, and Environment
6.2 Biofuel
6.2.1 Biochemical Fermentation of Food
6.2.2 Biochemical Fermentation of Biomass
6.2.3 Thermochemical Reactions of Biomass
6.3 Batteries
6.4 Nuclear Power
6.4.1 Mining and Fuel Enrichment
6.4.2 Nuclear Reactor Process
6.4.3 Safety, Health, and Environment
