Fossil fuels Fossil fuels include coal, oil and natural gas. Advantages of using fossil fuels At the moment, fossil fuels are relatively cheap and easy to obtain. This may not always be the case. Much of our infrastructure is designed to run using fossil fuels. Disadvantages of using fossil fuels Fossil fuels are non-renewable energy resources.
Their supply is limited and they will eventually run out whereas fuels such as wood can be renewed endlessly. It takes energy to get an object moving, and energy is released when an object slows down. Wind is an example of motion energy. A dramatic example of motion energy is a car crash—a car comes to a total stop and releases all of its motion energy at once in an uncontrolled instant. Sound is produced when a force causes an object or substance to vibrate. The energy is transferred through the substance in a wave.
Typically, the energy in sound is smaller than in other forms of energy. Electrical energy is delivered by tiny charged particles called electrons, typically moving through a wire.
Lightning is an example of electrical energy in nature. What is energy? Forms of energy. Units and calculators. Use of energy. Energy and the environment. Also in What is energy? Forms of energy Sources of energy Laws of energy. Also in Units and calculators explained Units and calculators Energy conversion calculators British thermal units Btu Degree days.
Also in U. Also in Use of energy explained Use of energy Energy use in industry Energy use for transportation Energy use in homes Energy use in commercial buildings Energy efficiency and conservation. Also in Energy and the environment explained Energy and the environment Greenhouse gases Greenhouse gases and the climate Where greenhouse gases come from Outlook for future emissions Recycling and energy.
Nonrenewable sources. Oil and petroleum products. Diesel fuel. Heating oil. The nation's fleet of over coal plants is responsible for 57 percent of the electricity generated in the U. Coal is typically burned to create steam, which is then piped at high pressure over a turbine, causing it to rotate, producing electricity. This steam electric system is a common one also used with other fuel sources, including oil, natural gas, geothermal, biomass, and even some solar-fueled systems. What are the environmental issues?
The popularity of coal is largely due to its low cost. Nevertheless, coal power plants are responsible for 93 percent of the sulfur dioxide and 80 percent of the nitrogen oxide emissions generated by the electric utility industry.
Coal emissions also cause urban smog, which has been linked to respiratory ailments, and coal-fired power plants also contribute to global climate change. Coal plants emit 73 percent of the carbon dioxide emitted into the atmosphere from electricity generators. By releasing the energy stored in coal, large quantities of carbon dioxide that have been stored in the coal for millions of years are released back into the atmosphere, increasing the threat of global warming.
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