solar energy

geothermal energy

vegetables

soil

water

sunlight

paper

plants

trees

coal

oil

natural gas

methane

uranium

silver

gold

aluminum

copper

nuclear energy

any fuel made from remains of prehistoric plants and animals

a wealthy country with an advanced economy

a resource that takes so long to form it can't be replaced

the way people or things are spread out over an area or space

oil that has been discovered but remains unused in the ground

energy produced by steam or hot water from deep inside the earth

a resource that can't be used up or that can be replaced as quickly as it is used up

petroleum as it comes out of the ground and before it has been refined or processed

In 1990, the United States went to war with Iraq to protect the oil reserves that belonged to who?

The war with Iraq to protect the oil reserves that belonged to Kuwait

Which country did the United States fight against in the Persian Gulf War?

trade organization formed by several oil exporting countries

SW/Central Asia is at the crossroads of which three continents?

Which region of the world has the world's largest oil reserves?