Best Roofing Materials For Your Property

What is sustainable development?
What is a Carbon Footprint?
What are the trade offs of using solar panels versus green roofs? Which is more appropriate for a prairie climate flat roof or pitched roof? What green products can be used on each type? How?
what building materials provide the best insulation? What are the trade offs in using the most efficient materials?

Sustainable development: http://en.wikipedia.org/wiki/Sustainable_development
Carbon Footprint: http://en.wikipedia.org/wiki/Carbon_footprint

Just try Google mate.

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One reason we need the arctic is to reflect energy from the sun? Could this effect be reproduced?