Recycling reduces littering. Recycling makes products last longer. Recycling puts less trash in the city landfill. Recycling increases the amount of dust in the air.
I gave my students this multiple choice question: Many cities encourage people to recycle. The items that can be recycled are placed in a special container and picked up each week from people's homes. How does recycling most likely help the environment?

Only one answer is correct among these 4 choices:
- Recycling reduces littering.
- Recycling makes products last longer.
- Recycling puts less trash in the city landfill.
- Recycling increases the amount of dust in the air.

Could you tell me which one is correct?

Recycling puts less trash in the city landfill.