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Correct Answer: B) Adding chemical fertilizers.
Correct Answer: C) Predation.
Correct Answer: A) Clearing land for farming.
Correct Answer: B) Conceptual model.
Correct Answer: B) Increasing the need to drive.
Correct Answer: A) 2.
Correct Answer: A) Sustainability.
Correct Answer: D) Carbon dioxide.
Correct Answer: D) Air pollution.
Correct Answer: C) Solid iron-nickel that is very hot and under great pressure.
Correct Answer: B) Reducing coal based electricity.
Correct Answer: C) "spaceship"Earth.
Correct Answer: D) Reclamation.
Correct Answer: A) It created a surplus of food.
Correct Answer: A) Land degradation.
Correct Answer: C) Immigration and birth.
Correct Answer: B) Desert.
Correct Answer: D) Killer whale.
Correct Answer: B) Catalytic converter.
Correct Answer: A) An adaptation.
Correct Answer: C) Non-Renewable Resources.
Correct Answer: C) Carbon footprint.
Correct Answer: A) Average temperature.
Correct Answer: D) Surface.
Correct Answer: B) Hydrosphere.