1. Environmental Issues
PB 饶子璇

2. 15 Major Current Environmental Problems
1. Pollution
2. Global Warming
3. Overpopulation
4. Natural Resource Depletion
5. Waste Disposal
6. Climate Change
7. Loss of Biodiversity
8.Deforestation
9. Ocean Acidification
10. Ozone Layer Depletion
11. Acid Rain
12. Water Pollution
13. Urban Sprawl
14. Public Health Issues
15. Genetic Engineering

3. I. Red Tide--Harmful Algal Bloom
A harmful algal bloom (HAB) is an algal bloom that causes negative impacts to other organisms via production of natural toxins, mechanical damage to other organisms, or by other means.
HABs are often associated with large-scale marine mortality events and have been associated with various types of shellfish poisonings.

4. I. Red Tide--Harmful Algal Bloom

5. I. Red Tide--Harmful Algal Bloom

6. II. Coral Bleaching
--Result from global warming and ocean acidification

7. II. Coral Bleaching --What is it???
Coral bleaching is the loss of intracellular endosymbionts (Symbiodinium, also known as zooxanthellae) from coral either through expulsion or loss of algal pigmentation.
Any environmental trigger that affects the coral's ability to supply the zooxanthellae with nutrients for photosynthesis (carbon dioxide, ammonium) will lead to expulsion.

8. Coral Bleaching
--Result from global warming and ocean acidification

9. III. The Arsenic Contamination

10. III. The Arsenic Contamination

11. III. The Arsenic Contamination --what's the outcome?
Long-term exposure to arsenic in drinking water can cause cancer in the skin, lungs, bladder and kidney. It can also cause other skin changes such as thickening and pigmentation.Exposure to arsenic in the workplace by inhalation can also cause lung cancer.
Soluble inorganic arsenic can have immediate toxic effects. Ingestion of large amounts can lead to gastrointestinal symptoms such as severe vomiting, disturbances of the blood and circulation, damage to the nervous system, and eventually death. (

12. References https://www.goconqr.com/en/p/724571-c2f-h-notes-notes
Dove SG, Hoegh-Guldberg O (2006). "Coral bleaching can be caused by stress. The cell physiology of coral bleaching". In Ove Hoegh-Guldberg, Jonathan T. Phinney, William Skirving, Joanie Kleypas. Coral Reefs and Climate Change: Science and Management. [Washington]: American Geophysical Union. pp. 1–18. ISBN
DPHE, Groundwater studies for arsenic contamination in Bangladesh.Rapid Investigation Phase. Final Report. Mott MacDonald International Ltd and British Geological Survey. Report prepared for Department of Public Health Engineering (Bangladesh) and Department for International Development, UK.
Roy.P and Saha.A (2002). Metabolism and toxicity of arsenic: A human carcinogen Department of Microbiology, Bose Institute, P-1/12, C.I.T. Scheme VII-M, Kolkata , India

13. Thank You!
September 7th, 2016