1. 12.1 A portrait of the Earth 12.3 Sustainable Development 12.2 Human Societies

5. The Gaia hypothesis is controversial, but has influenced how scientists view the world- large scale connections among the different systems are studied, and man is not necessarily considered to be exempt from the Cycles, forces and systems of nature.

7. 12.2 Human Societies Hunter- Gatherer Societies Agricultural Societies Industrial Societies

10. If Agricultural societies can live within the limits of the environment, they can be sustainable (allowing for crop rotation, no overgrazing etc.) However , early and sometimes present agricultural practices often harm the environment- overgrazing, deforestation, depletion of soil nutrients caused loss of vegetation changes in rainfall and Desertfication.

12. few er people produce more food, goods - science increases crop yields, people live longer –better medical care(population grows very quickly) Industrial societies cause great changes in the environment, but also Can also h elp solve environmental problems Industrial societies consume lots of energy, resources, and creates lots of pollution