Biofuels - A Renewable Energy Source

What are biofuels made from?

• Fossilized plants and animals

• Recently living plants and animals

• Metals and minerals

• Solar energy

Which of these is NOT a type of biofuel?

• Bioethanol

• Biodiesel

• Natural gas

• Biojet fuel

Why are biofuels considered carbon neutral?

• They do not release carbon dioxide.

• Carbon dioxide the biofuel produce is the same as the amount the plants take up as they grow.

• Biofuels clean CO₂ from the air.

• Biofuels release less energy when burned.

Ethanol is often mixed with jet fuel.

• True

• False

What is one disadvantage of biofuels?

• They produce no pollution.

• They require large amounts of land and water.

• They are cheaper to produce than fossil fuels.

• They increase food supply.

What is biodiesel mixed with?

• Sugarcane

• regular diesel

• Coal and natural gas

• Sunlight

What is one environmental benefit of biofuels?

• They produce less toxic chemicals than fossil fuels.

• They require no water to produce.

• They are made entirely from solar energy.

• They last longer than fossil fuels.

Biofuels can help farmers by increasing their incomes.

• True

• False

Which of these renewable energy sources is NOT mentioned in the text?

• Wind power

• Geothermal energy

• Nuclear energy

• Tidal power

What is the conclusion about biofuels in the text?

• They are the perfect solution to global warming.

• They reduce emissions but cannot replace all fossil fuels.

• Biofuels harm the environment and should not be used.

• Biofuels are cheaper than solar energy.