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         This
        section develops on a specific field of technology, illustrating
        techniques used in modifying the environment.
        
        
        
         
                    The
        needs of people have always been in conflict with the environment, and
        people have always set about changing their surroundings, first
        agriculture transformed the land, it was tamed, became a reliable food
        source for a growing population, in later times land was returned to its
        native state as people now desired to bring back nature, their
        agriculture replaced by technology. Soon people desired to change barren
        worlds, to bring them life, and so that they might explore their own
        power. |