Presentation on theme: "Nonrenewable Energy Energy Resources and Fossil Fuels."— Presentation transcript:
Nonrenewable Energy Energy Resources and Fossil Fuels
Fuels for Different Purposes Fossil fuels- Remains of ancient organisms that changed into coal, oil, or natural gas. Four main purposes: Transportation Manufacturing Heating and cooling Generating electricity Two main problems: Limited supply Environmental consequences
Electricity- Power on Demand Convenient Transports quickly across great distances Disadvantages: Difficult to store Must generate from other energy sources Electric generator- Converts mechanical energy (motion) into electrical energy. Turbine- Wheel that changes the force of a moving gas or liquid into energy that can do the work.
Coal-Fired Power Plant
Energy Use Dramatic differences in fuel use and efficiency throughout the world U.S. uses more energy per person than any other countries in the world except Canada and the United Arab Emirates.
Energy Use #1 use in United States- Industrial use #2 use in U.S.- Transportation Japan and Switzerland- Extensive rail systems Hydroelectric and nuclear power
Fossil Fuel Deposits Oil and Natural Gas Formation- Decay of tiny marine organisms causes heat Sediment cover causes pressure Energy-rich molecules in porous rock formations Coal Formation- Decay of swamp plants Oceans rose and covered with sediment Heat and pressure caused coal to form
Fossil Fuel Deposits of United States
Energy Production by Source
Coal Most of worlds fossil fuel reserves Asia and North America- rich in coal Disadvantages: Top-mining coal damages surface Toxic waste Air pollution- Sulfur dioxide produces acid rain Advantages: Relatively inexpensive Needs little refining after its mined
Electricity Generation in the United States
Petroleum Pumped from the ground, a.k.a. crude oil. Petroleum products- anything made from crude oil 45% of worlds commercial energy use Trapped in folds, faults, and salt domes which; bound by impermeable layers of rock
Environmental Effects Oil spills Leaking vehicles Release of pollutants when burned Carbon dioxide- Global warming Sulfur dioxide- Acid rain Smog
Natural Gas 20 % of worlds nonrenewable energy Methane, CH 4 Fewer pollutants when burned Can be used to generate electricity
Fossil Fuels and the Future 90 % of energy used in developed countries Demand to double by 2050 Costs will likely increase Oil reserves- Oil deposits that can be extracted profitably at current prices using current technology. Cost of obtaining influences extraction More under ocean Difficult to drill Expensive