using natural gas to heat homes building dams to produce electricity cutting down trees to build new homes recycling paper to reduce the cutting of trees
I gave my students this multiple choice question: Human activities affect the natural environment in many ways. Which action would have a positive effect on the natural environment?

Only one answer is correct among these 4 choices:
- using natural gas to heat homes
- building dams to produce electricity
- cutting down trees to build new homes
- recycling paper to reduce the cutting of trees

Could you tell me which one is correct?

recycling paper to reduce the cutting of trees