Civilization doesn't have to be unsustainable anymore.
http://www.vegsource.com/how_to_win.htm

Sustainable Energy
http://www.nesea.org/

ENVIRONMENTAL ETHICS: SUSTAINABILITY, COMPETITION, & FORESTRY
http://www.ethics.ubc.ca/papers/susdev.html

Forestry Alternatives
http://healingharvestforestfoundation.org/

Animals as pets
http://www.bbc.co.uk/ethics/animals/using/pets.shtml