it is a ppt on global warming

1. Global Warming
Greatest Threat To Humanity

2. What is Global Warming?
• Global warming is when the earth heats up
(the temperature rises).
• It happens when greenhouse gases (carbon
dioxide, water vapor, nitrous oxide, and
methane) trap heat and light from the sun in
the earth’s atmosphere, which increases the
temperature.
• This hurts many people, animals, and
plants. Many cannot take the change, so
they die.

3. Global Warming - Examples
June 2002 Dec 2003

4. Global Warming - Examples
1914
2004

5. Why it is happening?

6. Main cause
• Raise in normal temperature
• Imbalance in greenhouse effect

7. Greenhouse Gases
Nitrous oxide
Water
Carbon dioxide
Methane
Sulfur hexafluoride

8. 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. Why it happens?
Burning carbon-containing fossil fuels
produces carbon dioxide

10. As the temperature of oceans rise, so will the
probability of more frequent and stronger
hurricanes.
Warmer waters and more
hurricanes

11. Increased probability and intensity of
droughts and heat waves

12. Increase in frequent volcanic
eruptions due to rise in
temperatures

13. Forest fire increased due to hot
winds

14. Climate Change
• Important factor affected as a result of
global warming
• Climate change happens when there is a
change in
– Sun’s output
– Earth’s orbit
– Drifting continents
– Volcanic eruptions
– Greenhouse gases

17. Plastic bags and cups do
not decompose so
harmful to environment
Paper bags and cups
are eco friendly and
easily decomposable
Reduce the usage
of cars for short
distances
Walk /use cycles for
short distances

18. What Can Be Recycled?
Paper Items
Paper Cardboard Envelopes Phone Books Post-it Notes Magazine
Bottles and Cans
Cans Plastic Bottles Glass Bottles Aluminum Foil Yogurt and Cottage
Cheese containers

19. Advantages of 3R’s
Reduction of
wastages
Less pollution
Efficient
use of
resources
Increase
in energy