recycling paper products watering the lawn once a week designing cars that are fuel efficient using coal to generate electricity
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which of these reduces the need for people to use nonrenewable resources?
Possibilities:
- recycling paper products
- watering the lawn once a week
- designing cars that are fuel efficient
- using coal to generate electricity

designing cars that are fuel efficient