Where are the most active geothermal resources usually found?

• near oceans

• in the river

• near volcanoes

• in the forest

_________ contributes to global warming because it produces greenhouse gasses.

Wind turbines can be utilized on a large scale only.

• True

• False

• Does not say

This is a biologically produced fuel made from plant and animal material.

Which is the oldest source of renewable energy, used since when humans started burning wood for fire?

• solar energy

• geothermal energy

• biomass energy

• wind power

This renewable energy can convert trapped heat in the ground into steam to turn turbines.

Gases, such as _________, causes gradual warming of the Earth's atmosphere.

• nitrogen

• carbon monoxide

• carbon dioxide

• oxigen

Which renewable energy uses devices called photovoltaic cells?

This is created through a relatively cheap process and is considered the most affordable form of electricity.

• biomass energy

• wind power

• hydropower

• solar energy

Producing biomass energy reduces the need to bury garbage under the ground in a landfill.

• True

• False

• Does not say