I would suggest that you do create a wind turbine, and then show how the kinetic energy is turned to energy that can be used. You can include the science factors of this and then the global affects of not using renewable sources.
hope that's helped!
Decomposition, energy, light, electricity, and photosynthesis are all good science fair topics
life science
candy science
Yes. It is a great science fair project. Easy and fun
google.com or science fair projects.com
a good science fair project about energy is a water cycle and would be put in the Energy Awareness category
Your school website is a good website to find a science fair project. Science programs for kids typically have websites with projects listed. PBS has a website for kids that includes science projects.
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www.sciencefairs.com