Survey Questions

I am currently carrying out this survey.
Here's the survey:
We are doing a survey on Global Warming and we are making a board game regarding clean energy. Please answer sincerely and circle the answer you think is correct for this section.
(1)Is the Earth experiencing Global Warming?(Yes/No)
(2)To what extent do you think you know clean energy?(V Good/Good/OK/Bad/Very Bad)
(3)Is geothermal energy a 'clean energy'?(Yes/No)
(4) Do you think it is possible for a country to operate on hydroelectricity(Yes/No)
(5)Can we reduce Global Warming? (Yes/No)
(6)Do you know about “Hopenhagen” held last year?(Yes/No/ Maybe)
(7)Do you think using renewable energy will slow Global Warming?
(8)Do you plan to turn off your lights for Earth Day? (Yes/No/ Maybe)
This is the open-ended section. Please answer sincerely.
(9)What do you understand about Global Warming?(eg. How to prevent it)
(10)We are creating an educational boardgame. Do you think this is a good idea and is practical?
(11)We would like some suggestions on how to improve on our product.
(12)Some questions you would like us to use in the game.
(13)Do you think a boardgame is a good idea? Give us your comments as well.