The electricity needed to keep food cold can be expensive. If the electricity goes out, the food will spoil and make you sick. Storing food longer reduces grocery store trips and gasoline use. Old refrigerators contain chemicals and take up space in landfills.
I gave my students this multiple choice question: A refrigerator uses electricity to create a cold place to store food. What negative impact does refrigerator use have on the environment?

Only one answer is correct among these 4 choices:
- The electricity needed to keep food cold can be expensive.
- If the electricity goes out, the food will spoil and make you sick.
- Storing food longer reduces grocery store trips and gasoline use.
- Old refrigerators contain chemicals and take up space in landfills.

Could you tell me which one is correct?

Old refrigerators contain chemicals and take up space in landfills.