What do we know about the way Native Americans lived, worked and played? How does environment change the way they lived?
How can we ensure all transportation use only renewable/clean energy for zero emission.
What would happen to Earth if the hole in the ozone layer continues to grow?
How can renewable energy help reduce global warming?
What is the function of flies and mice within their ecosystems?
Para que existen las moscas y los ratones? (Big Question originally submitted in Spanish).
Why can it be important to grow your own garden produce?
What can be done to improve the sustainability of an economically challenged farm?
Why can you find ants in most countries on earth?
What are trees?
While there is no pollution and CFC at the North Pole, why is there still a hole in the ozone layer?
(Question asked by my 10 yr son studying in 5th grade).