Presented by Dr.Abdul Ghani Assistant professor of Botany

1. Global warming Presented by Dr.Abdul Ghani Assistant professor of Botany

2. What is Global Warming? • Global Warming is the increase of Earth's average surface temperature due to effect of greenhouse gases, such as carbon dioxide emissions from burning fossil fuels or from deforestation, which trap heat that would otherwise escape from Earth. This is a type of greenhouse effect.

3. Global Warming – What is it? • Rise in earth’s temperature • Results from changes in the natural environment • Caused by too much carbon dioxide

4. What is the greenhouse effect? The burning of fossil fuels and forests increases CO2in the atmosphere. Increases in CO2 cause more heat to be trapped in the earth's atmosphere. As a result, global temperatures are rising. Warmer temperatures raise sea levels (by melting more ice) and decrease agriculture output (by affecting weather patterns).

5. What are greenhouse gasses? • Greenhouse gasses are gasses are in the earth’s atmosphere that collects heat and light from the sun.  With too many greenhouse gasses in the air, the earth’s atmosphere will trap too much heat and the earth will get too hot.  As a result people, animals, and plants would die because the heat would be too strong. 

6. Burning of fossil fuels • The burning of fossil fuels releases Carbon dioxide in the atmosphere. • In the past 150 years, burning fossil fuels has caused a 25 % increase in Carbon dioxide emissions.

7. Carbon Dioxide (CO2) Fossil fuels (coal, oil, natural gas) How Global Warming Works

8. Example of the Greenhouse Effect The Sun’s energy passes through the car’s windshield. This energy (heat) is trapped inside the car and cannot pass back through the windshield, causing the inside of the car to warm up.

9. What’s the difference between “global warming” and “climate change”?

10. Difference GLOBAL WARMING is the increase of the Earth’s average surface temperature due to a build-up of greenhouse gases in the atmosphere. CLIMATE CHANGE is a broader term that refers to long-term changes in climate, including average temperature and precipitation.

11. Effects of Global Warming Rising Sea Level Increased Temperature Habitat Damage and Species Affected Changes in Water Supply

12. Impacts of Climate Change • Temperature rise • Precipitation(Rainfall) • Soil Moisture • Changing Habitats • Sea Level Rise • Ocean Currents

13. Why is Global Warming Happening?

14. Burning of Fossil Fuels Pollution from coal, natural gas, and oil Pollution from coal, natural gas, and oil Pollution from coal, natural gas, and oil

15. Causes of global warming. • Due to the increase in the atmosphere of greenhouse gas concentrations like • Water vapor. • Carbon dioxide (CO2). • Methane. • Ozone. • Nitrogen oxides. • CFC’s. • Deforestation increases the harshness of global warming as well. • Greenhouse gases are those gases that contribute to the greenhouse effect . The largest contributing source of greenhouse gas is the burning of fossil fuels leading to the emission of carbon dioxide.

16. Effects of global warming • More carbon dioxide -> increase in plant growth. • The increase in temperature -> rise in sea level from melting glaciers and polar ice caps (adds 0.2 mm annually) • Rising temperatures will also cause drier conditions in many important agricultural regions.

17. Health & Global Warming • Extreme temperatures can directly cause the loss of life (ex: 35,000 people died during heat wave in Europe, Aug‘03.) • Warmer weather provides an ideal breeding environment for mosquitoes. Diseases such as West Nile will be more common.

18. Health & Global Warming • High temperature can increase pollution of water and air, which harms the human body.

19. Tropical Diseases • Global Warming increases drought which lessens the supply of clean drinking water. • Cholera

20. Tropical Diseases • It increases temperature providing an ideal breeding environment for mosquitoes. • Dengue fever • Malaria • Yellow fever

21. What’s being done now to reduce our emissions? Solar Power Fuel-Efficiency Wind Power

22. What can you do to help solve the problem?

23. Simple Things To Do Turn off your computer or the TV when you’re not using it. Take shorter showers. Heating water uses energy. Keep rooms cool by closing the blinds, shades, or curtains. Turn off the lights when you leave a room. Use compact fluorescent bulbs.

24. Simple Things To Do Dress lightly when it’s hot instead of turning up the air conditioning. Or use a fan. Dress warmly when it’s cold instead of turning up the heat. Offer to help your parents keep the air filters on your AC and furnace clean. Walk short distances instead of asking for a ride in the car. Plant a tree. Recycle.

25. Am I responsible for global warming? Forty people representative transit riders seated together in one bus-sized space. Forty people in automobiles closely spaced apart on the street

26. How To Prevent Global Warming: • Plant trees • Conserve energy: (examples: 1. use low-energy, low-water-use washing machines, 2. use a solar heated system for hot water) • Buy energy efficient products • Buy products that have reuse able or recyclable packaging • Reduce use of car (walk instead)

27. 3R’s of Saving Mother Nature Reduce, Reuse, Recycle!

29. References • http://www.bing.com/search?q=+causes+of+global+warming&form=QBRE&qs=n&sk=&sc=1-24 • http://www.bing.com/search?q=WHO+definition+of+global+warming&src=IE-SearchBox&FORM=IE8SRC • http://timeforchange.org/effects-of-global-warming • http://timeforchange.org/responsibility_and_carbon_footprint • http://www.umich.edu/~gs265/society/greenhouse.htm

30. Thank you..