I have a school project in my science class and we are making dioramas of Eco friendly house' and we have to make a materials list of what we would use on a real energy-saving house and why! Help?

What do YOU think ?
While we're happy to HELP we wont do all the work for you.
Show us what you have done and where you are having problems..

There's nothing earth-wasting about the typical woods used on home construction, spruce/fir/pine. Those are fast growing softwoods that are easily replenished.
(Many parts of the world, however, have few forests, few trees, and use mud and stucco, but I assume you are talking about the US or Canada or eastern Europe.)