1. Acid Rain By HO Pui Sing Wong Yu Fai

2. Content • Definition of Acid Rain • Damage of Acid Rain • Formation of Acid Rain • Sources of Pollutants • Solutions • References

3. Definition of Acid Rain • Normal pH value of Rain is 5.6 • pH value < 5.6 Acid Rain Definition: All forms of precipitation, snow, rain, hail or dust particles, that contain a degree of acidity higher than those which normally occur in nature.

4. Damage of Acid Rain • Soil • Forests / vegetation • Aquatic organisms • Ancient Buildings • Buildings • Human health

5. Soil • Soils can be damaged by removing needed nutrients and dissolving toxic heavy metals from the soil. • Not Suitable for farming

6. Forests / Vegetation • Acid rain can damage the foliage of trees (leaves etc.), and retard their growth. • Metals such as aluminum can get into the roots of plants and prevent the uptake of other important nutrients.

10. Aquatic organisms • Increasing the concentration of toxic heavy metals in surface waters. • Acidification can hinder the ability of aquatic organisms to reproduce. • Ecosystem will be collapse.

13. Healthy Acidize

14. Ancient Buildings • Damage of Ancient Buildings

15. Buildings • Construction materials such as limestone, marble and sandstone can also be damaged by acid rain, resulting in eroded buildings and monuments. • Value loss

16. Tai Kwok Tsui Tai Po Old Market

17. Human Health • Acid rain can aggravate respiratory ailments such as bronchitis and asthma. • Drinking water which contains higher levels of toxic metals

18. Formation of Acid Rain

19. Formation of Acid Rain

20. Sources of Pollutants • SO2, CO2, NOx • Fossil Combustion Air Pollution Human-related phenomenon.

21. Solutions • Legislation and Punishment • Technology improvement • Low sulphur content fuel • Improve the efficient of machines • Filtering system • Alternate energy • Energy Conservation • Change life style • Education

22. Reference • http://ga.water.usgs.gov/edu/acidrain.html • http://www.iclei.org/efacts/acidrain.htm • http://www.geocities.com/CapeCanaveral/Hall/9111/DOC.HTML#INTROEFFECT • http://eces.org/gallery/airgfx/air65.shtml • http://hikingthecarolinas.com/photo1.htm • http://www.epa.gov/airmarkets/acidrain/index.html • http://www.corbis.com

23. The End