Discusses how many people the earth can support in terms of economic, physical, and environmental aspects.

Excerpt from A Comparison of Carrying Capacity Perceptions Among Visitors to Two Wildernesses Significant differences were revealed in an analysis of the pref erence for inter-party contacts and the consequences of not finding preferred conditions. For contacts with backpackers and with large parties (defined as 12 or more people), medium satisfaction levels were consistently higher at increasing levels of contact in the Desolation Wilderness than in the Spanish Peaks. No contact with other parties at campsites was especially important in both areas. In general, it appears that Desolation visitors, exposed to higher use levels, have become more tolerant of heavy use than their Spanish Peaks counterparts. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Black & white print. Concepts of Biology is designed for the typical introductory biology course for nonmajors, covering standard scope and sequence requirements. The text includes interesting applications and conveys the major themes of biology, with content that is meaningful and easy to understand. The book is designed to demonstrate biology concepts and to promote scientific literacy.