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Match it! Select the correct answer from the pull down...Good luck!
Forests play an important role in controlling the ______________.
the sun
Human Footprint Map
carbon dioxde level atmosphere
fossil fuels
geothermal energy
electric power
greenhouse effect
soil
What was used by scientists to show how much humans have affected the Earth's ecosystems?
the sun
Human Footprint Map
carbon dioxde level atmosphere
fossil fuels
geothermal energy
electric power
greenhouse effect
soil
What was often used as an energy source when factories began mass producing clothing, furniture, and farm machines?
the sun
Human Footprint Map
carbon dioxde level atmosphere
fossil fuels
geothermal energy
electric power
greenhouse effect
soil
What energy is from the heat inside the Earth?
the sun
Human Footprint Map
carbon dioxde level atmosphere
fossil fuels
geothermal energy
electric power
greenhouse effect
soil
What produces most of the energy that is used in the United States?
the sun
Human Footprint Map
carbon dioxde level atmosphere
fossil fuels
geothermal energy
electric power
greenhouse effect
soil
This natural resource can take hundreds of year to form and can easily be eroded.
the sun
Human Footprint Map
carbon dioxde level atmosphere
fossil fuels
geothermal energy
electric power
greenhouse effect
soil
Where was the energy released from fossil fuels originally captured from?
the sun
Human Footprint Map
carbon dioxde level atmosphere
fossil fuels
geothermal energy
electric power
greenhouse effect
soil
_________________ is when gases produced by burning fossil fuels trap heat in the air.
the sun
Human Footprint Map
carbon dioxde level atmosphere
fossil fuels
geothermal energy
electric power
greenhouse effect
soil
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