1. They will use biogas for cooking soon.

    Biogas will be used for cooking soon. 

2. They will use low energy lights to save electricity.

    Low energy lights will be used to save electricity.

3. When more people drive cars, we will release more carbon dioxide into the air.

    When more people drive cars, more carbon dioxide will be released into the air.

4. On the next Earth Day, they will discuss global warming effects.

    On the next Earth Day, global warming will be discussed effects

5. Solar panels will convert solar power to electricity more efficiently.

    Solar power will be converted to electricity more efficiently by solar panels.

6. How about cycling to school with me tomorrow? 
    Let’s cycle to school with me tomorrow

7. What is the meaning of this road sign?
    What this road sign mean?

8. Accident is the main cause of traffic jams in Bangkok. (CAUSED)
    Traffic jams in Bangkok are main caused in Bangkok by accident

9. People will be fined if they don’t obey the traffic rules.
    People will be fined if they disobey the traffic rules

10. I spend 30 minutes walking to school every day.
    It takes me 30 minutes to walk to school every day.