1. Less electricity will be used by us in the future.
2. Public transport will be used by the students in my school when travelling long distances.
3. The lights will be turned off by me when leaving a room or going to bed.
4. A great deal of energy will be offered by wind power next century.
5. Sources of energy will be used more effectively by us for our future.
6. The use of biogas will be increased by people in the countryside for cooking.