Chuyển các câu sang bị động

2. In the future, civilization will be forced to research and develop alternative energy sources by an energy crisis.

3. A report in November about current figures of greenhouse-gas emission will be released by the United Nations Intergovernmental Panel on Climate Change (IPCC).

4. The sun will be used as the biggest energy source in the future by human.

5. Because of climate change, a lot of money will be spent on heating and cooling, much more than they used to.

6. The use of electricity will be minimized to save our energy.

7. We will be allowed to work around these challenges by space-based solar power.

8. Many kinds of alternative energy will be discussed to address concerns about fossil fuel, such as its high carbon dioxide emissions by people.

9. Because of the variety of energy choices and differing goals of their advocates, defining some energy types such as " alternative" is considered as controversial by people.

10. Most of fossil fuel will be replaced by solar energy in the future.