Ecology (Britannica Illustrated Science Library)
Encyclopaedia Britannica | 2010 | ISBN: 1615353410 | 104 pages | PDF | 35,6 MB
Long ago when people still lived in caves-perhaps at the same time when they developed habits that were different from those of other animals- humans began to practice ecology. They became keen observers of nature through such basic and instinctive actions as tracking both large wild animals and small prey, discerning edible plants from poisonous ones, and noting the time of year when different plants could be gathered. From necessity and inherent curiosity, humans began to learn about the relationships between living things and the environment.