You have been asked to prepare a speech for the annual convention of Citizens for a Greener Planet, a national environmental group,on the idea of sustainable development.Since many of your listeners are not scientists,you want to use examples that lay people can understand.You have decided to illustrate the concept by discussing the social and environmental factors that brought about the collapse of the Easter Island civilization. You then intend to compare these events to the on-going deforestation of the Amazon rain forest. Conclude the speech by explaining what should be done to make sustainable development a reality.