There is a great concern about the threat to natural woodland in the world, espeaally the rain forests of tropical areas such as South America. People are often urged to re-cycle paper in order to save trees. However, the type of wood used for paper is softwood which is grown as a renewable crop in areas where there is no remaining natural woodland. Producing paper from these trees does not harm the natural environment any more than does the production of bread from wheat. Which one of the following is a conclusion which can be drawn from the above passage?