EQ

1)  best, most effective

2)  A possible answer is to inform people about common misconceptions on Sustainable Living.  Also, show people easy and cheap ways to help offset their use of limited resources.

3)My most important source so far has been the article from this site:

http://www.theecologist.org/trial_investigations/268287/10_reasons_why_organic_can_feed_the_world.html

The reason why, is that this article explains the misconceptions behind organic food and the impact that it has on the world.  The yields of organic farms are actually larger and use less energy than conventional farms.  Also, this can reduce a person's carbon footprint dramatically if the food is local as well as being cheaper if the people get it directly from the farmer.