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ple began to look for different, or alternative, sources of energy to power their vehicles, heat their homes, and light streets and buildings. They worried that the traditional sources of energy, such as coal, oil, and nuclear power, were using up natural resources and harming the natural environment. Alternative energy sources include solar power, wind power, and waterpower. These and other energy sources that cannot be used up are called renewable, or green.

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Information cam from Britannica Online, Discovery Education, and Science Pebble GO

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Nonrenewable Resources   | Nonliving things make up another kind of natural resource. These resources ...

A fact I know is it takes millions of years to make it back.

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Examples include the sun, wind, rivers and oceans, heat from inside Earth, and biofuels. These energy sources can be . The fact I know: Cow patties and corn husk are burned and this makes a gas to make electricity.

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A nontraditional source of energy that is not from fossil fuels.
A real world example would be a solar panel on a house to provide electricity. One fact: This is a form of mechanical energy. The shape of the wind turbine transfer energy to store and then gives energy to cities.

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hydroelectric power   |   electricity produced from generators driven by turbines that convert the potential . Fact I know: A dam has turbines underwater that gives the energy to the generator. This can block the fish from moving. The heat from the dam can also kill or harm the fish

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Geothermal energy is heat that comes from inside Earth. It is an alternative energy source that can be used for cooking, bathing, and heating. It can also be converted into electricity. Geothermal energy is available anywhere on Earth’s surface. In some places, such as Iceland, the heat is so close to the surface it can be easily used as an energy source. In other places holes must be drilled down through rocks to reach the heat.

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In the late 1900s people began to look for different, or alternative, sources of energy to power their vehicles, heat their homes, and light streets and buildings. They worried that the traditional sources of energy, such as coal, oil, and nuclear power, were using up natural resources and harming the natural environment. Alternative energy sources include solar power, wind power, and waterpower. These and other energy sources that cannot be used up are called renewable, or green. A fact I know: water and solar panels give free power to houses.

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Fossil fuels are made from the remains of dead plants and animals. In stagnant lakes and seas, the dead remains of organisms reach the bottom. Sediments like sand, mud, and stone bury the matter deeper. Over millions of years, the sedimentation increases, resulting in more heat and pressure. This leads to the formation of oil and natural gas. Coal forms from dead trees and plants in swamps. Remains of dead trees and plants sink to the bottom of the swamp. They are covered by layers of sand, clay and other minerals. Heat and pressure change the dead decayed plants into coal.

A real world example would be the oil rigs drilling for oil.

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Wind power is an alternative energy source. This means that the power of the wind can be used in place of other energy sources such as coal, oil, and nuclear reactions. Wind can be used to produce electricity that heats homes and lights streets and buildings.