What You Need to Know About Energy (2008) / Chapter Skim
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Sources and Uses
Sources and Uses
Pages 6-11
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The sun's energy warms the planet's surface, powering titanic transfers of heat and pressure in weather patterns and ocean currents. The resulting air currents drive wind turbines.
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* One exception to the solar and local nuclear origins of Earth's energy promises only an exceedingly small contribution to our total energy picture at present: Some engineers are exploring methods for capturing energy from ocean tides, thus tapping into a gravitational source of energy.
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Once electricity Another familiar form of conversion loss occurs leaves the plant, further losses occur during delivery. in a vehicle's internal combustion engine.
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Furthermore, it is difficult passengers. In natural gas combined cycle, or NGCC, to deliver the energy needed to power an electric car power plants, we now have technology that takes the in an acceptably short time.
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household consumes electricity Percentage of energy consumed by each at the rate of a little more than one kilowatt, for economic sector in the United States in 2006.* an annual total of about 10,000 kilowatt-hours *
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From page 11... ...
to 380 ppm -- and concentration in the atmosphere has risen about contributes to global warming and ensuing climate change. At present, the United States emits approxi mately one-fourth of the world's greenhouse gases, and the nation's CO2 emissions are projected to rise from about 5.9 billion metric tons in 2006 to 7.4 billion metric tons in 2030, assuming no changes to the control of carbon emissions.
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