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Carbon Dioxide
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| A colorless, odorless gas present in the Earth's
atmosphere. Carbon dioxide is a greenhouse gas that contributes
to global warming and climate change. It is released into
the atmosphere through the burning of carbon-containing fossil
fuels such as petroleum and coal. |
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Coal
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| A fossil fuel found deep within the ground. Coal
is burned as a primary source of energy for heat and electricity
around the world. |
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Fossil Fuel
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| The remains of ancient plants and animals found
deep within the ground. Fossil fuels are the primary source
of energy around the world. |
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Hydrogen
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| A colorless, odorless gas that combines with
oxygen to form water. Hydrogen is the most abundant element
in the universe. |
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Natural
Gas
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| A fossil fuel that is often used to generate
electricity and for heating homes. |
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Nuclear
Power
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| Energy that is released by reactions within the
nucleus of atoms. Nuclear power is used to generate electricity
in some regions of the world. |
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Oil
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Peat
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| A fossil fuel that is formed when plants decay
in marshy or wet areas. Dried peat can be used as fuel for
cooking or heating homes. |
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Petroleum
Derivatives
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| Fuels that are obtained by refining petroleum.
These include gasoline, kerosene, diesel and fuel oils. |
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Petroleum
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| Also called crude oil, petroleum is a fossil
fuel that is found in liquid form within the earth. It is usually
extracted by drilling wells. Petroleum is refined to produce
different types of fuels such as gasoline for cars. |
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Photosynthesis
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| A process in which plants use energy from the
sun to convert carbon dioxide and water into oxygen. |
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Refinery
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| An industrial process that breaks crude oil down
into useful petroleum products such as gasoline, diesel, and
kerosene. |
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Renewable
Energy
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| Naturally occurring forms of energy that are
not derived from fossil fuels. Renewable energy sources are
energy sources that will not run out. Examples include solar
energy and wind energy. |
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Seam
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| A thick layer of coal under the ground that is
often called a coal bed. |
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Trade Deficit
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| A situation in which a country imports more goods
than it exports. This is known as a trade deficit because the
flow of wealth is leaving the country rather than coming in. |
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