Question: Which describes the greenhouse effect?

Answer: c a natural process

Question: A factory is emitting large amounts of CFCs into the atmosphere. How might this affect people?

Answer: c increase in the rate of skin cancer

Question: Which is a renewable resource?

Answer: b wood

Question: Which gases contribute to the greenhouse effect?

Answer: b carbon dioxide and methane

Question: Which of the following substitutions can help reduce air pollution?

Answer: a using a bike instead of a car

Question: Which is a nonrenewable resource?

Answer: d coal

Question: A new highly nutritious crop is going to be planted in an area where it has never been planted before. Which is the most likely outcome of such an event?

Answer: c negative as it threatens local biodiversity

Question: Why are invasive species dangerous to the environment?

Answer: c They threaten biodiversity.

Question: As the human population grows, what happens to our natural-resource requirements?

Answer: a They increase.

Question: Which results from an increase in the greenhouse effect?

Answer: d global warming