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Oil Sands: Energy Evolution and Environmental Concerns

science.howstuffworks.com/environmental/green-science/oil-sands.htm

Oil sands are a mixture of clay, sand and water with a small amount of bitumen. Learn about oil sands, find out how energy intensive it is to refine oil sands.

How Uranium Mining Works

science.howstuffworks.com/uranium-mining.htm

Thanks to our voracious appetite for energy, the element long linked with nuclear weapons is taking on a new role. Where does the hunt begin for uranium?

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