Distinguish between high-quality energy and low-quality energy, and give an example of each. Relate these terms to energy efficiency

Since this is not my area of expertise, I searched Google under the key words "'high quality' 'low quality' energy" to get these possible sources:

http://www.urbanext.uiuc.edu/world/energy.html
http://bioweb.wku.edu/courses/Biol280/280mat.HTML
http://www.theoildrum.com/story/2005/9/21/1156/96411

Search the sources for your terms.

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search.

I hope this helps. Thanks for asking.