You can always use other sources to enhance your work but needs citation of other sources. and any other sources that you may find via Googling! Please read the book carefully and cite page numbers for the discussion questions. Quality and completeness are the key for garnering points. Please no vague or fuzzy answers.

Sustainable Energy, Richard Dunlap, 2nd SI Edition, Copyright © 2019 by Cengage learning, Stamford, CT. ISBN-13: 978-1337551670