Global warming
- 2. Global Warming What is it? Earth has warmed by about 1 º F over the past 100 years. But why? And How? Scientists are not exactly sure. The earth could be getting warm on it’s own.
- 3. However …. • Many of the world’s leading climate scientists think that things people do are helping to make the Earth warmer. • Scientists are sure about the greenhouse effect. They know that greenhouse gases make the earth warmer by trapping energy in the atmosphere.
- 6. What is a GREENHOUSE ? • Greenhouses are special buildings usually made from glass & steel. They are used to grow plants which need humidity, tropical temperature & constantg rowing condition. • In a glass greenhouse heat builds up & gets trapped due to presence of CO2. It offers plants a warm and humid environment, even if the outside weather is dry , windy or cold.
- 8. Evidence that CO2 is Cause carbon dioxide vs. global temperature graph
- 10. Most scientists blame industrialization: Automotive Industry (low fuel economy) Oil companies (fossil fuels)
- 11. Power plants (coal) Agri-business (biofuels, deforestation, cattle producing methane) Logging Industry (deforestation)
- 14. Air Quality An increase in the concentration of ground-level ozone Damage lung tissue Harmful for those with asthma and other chronic lung diseases
- 15. Food supply Rising temperatures and variable precipitation Decrease the production of staple foods in many of the poorest regions Increasing risks of malnutrition
- 16. UV Exposure (Australia) • Skin Cancer – an abnormal growth of skin tissues. • Premature aging – make the skin thick, wrinkled, and leathery • Cataracts – No longer have transparent lenses in their eyes
- 17. UV Exposure (Australia) • Other Eye Damages – Skin cancer around the eyes – Degeneration of the yellow spot • Suppression of Immunity – Overexposure to UV radiation suppress proper functioning of the body's immune system and natural defenses of skin – UV-B radiation weakens the immune system increases the chance of infection and disease
- 18. Population displacement Rising sea levels Increase the risk of coastal flooding (Necessitate population displacement) • More than half of the world's population now lives within 60km of the sea. • Most vulnerable regions: Nile delta in Egypt, the Ganges- Brahmaputra delta in Bangladesh, many small islands, such as the Maldives, the Marshall Islands and Tuvalu.
- 19. Industrialization is the primary cause of global warming.
- 20. Are alternative sources of energy the answer?
- 21. The Kyoto Protocol – effective or not?
- 23. Industries should cut greenhouse gas emissions now.
- 26. Melting polar icecaps will raise ocean levels; the Arctic Ocean could be ice free in summer by 2050.
- 27. Global sea levels could rise by more than 20 feet, devastating coastal areas worldwide.
- 28. Heat waves, droughts, and wildfires will be more frequent.
- 29. Catastrophic weather such as hurricanes will increase.
- 30. More than a million species worldwide could be extinct by 2050.
- 31. Endangered
- 35. Is unlimited economic growth really desirable?
- 36. Industrial growth should be slowed or limited in order to curb global warming.
- 37. Do newly-developed economies, like India and China, have a right to increase their industrial emissions?
- 38. The Earth is getting warmer. What causes the warming is hotly debated.
- 39. The Argument: Human causes (Anthropogenic): Carbon dioxide (CO2) exhaust from cars and power plants. Methane gas from waste Deforestation
- 40. The Argument: Natural causes: Some claim the sun is getting hotter. Also, the earth goes through natural cycles of climate change.
- 41. 1973 CONFLICTING INFORMATION 2005
- 42. Is it already too late?