13185_SFMA_1888_pt03
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Various people at work at industrial jobs. Soda bottles make their way down an assembly line. Two different building constructions. Secretaries at work in an office. An airplane flies by. Cars on a multilane highway. New cars in a lot. Still photos of the four sectors of society: industrial, transportation, commercial, and residential, each of which uses energy. A chart shows energy resources since 1860: wood, water, coal, oil, gas, and nuclear. Dependence on fossil fuels creates the energy dilemma.