1. Copyright Statements Course materials contained in all PPT files are copyrighted and should not be reprinted or distributed without permission. Students who have registered in this course can use the course materials for educational purpose only.

2. Human Impacts on Environment I. Environment II. Human Impacts III. Debates on the Solution

3. I. Environment Environment: sum of the physical world. Biosphere (Ecosphere) Atmosphere, hydrosphere, lithosphere Ecosystem: Self-contained, self-regulating

4. II. Human Impacts Global cooling or warming? ~ Before the 1940s: “icebox effect” ~ Since the 1980s: global warming Acid Rain Land Surface Changes ~ Deforestation ~ Desertification ~ Soil Erosion Others

6. Intensified greenhouse effect

7. Depleting the ozone layer

8. The geographic scale of environmental impacts

9. Trends in greenhouse gases

11. The formation and effects of acid precipitation

12. The hydrologic cycle

13. Acid precipitation: areas of origin and of current problems

14. Where acid rain falls

15. Human transformation of the land

16. Desertification

17. The world pattern of soil degradation concern

19. Deforestation

20. Asian Brown Cloud

21. III. Debates on the Solution The Limit to Growth: stop growth Neo-classic: technological advancement as the solution → continue to growth Liberal: reduce consumption rational planning / redistribution Radical: fundamentally change the system of political economy