1. Can you name some fossil fuels / renewable energy sources? What can you do to encourage people to use renewable energy in Vietnam?
2. Can you name some types of environment pollution? In your opinion, what will the environment look like in the next 100 years? What can you do to protect the environment?
3. Can you name some wonders of the world / heritage sites in your country / in the world? Where have you been to? Can you describe one? Where would you like to visit in the future?