Global warming is the phenomenon of rising temperatures in Earth's atmosphere and oceans, primarily caused by variations in solar activity, fluctuations in ocean currents, volcanic eruptions, and greenhouse gases. The greenhouse effect, where certain gases trap heat, has led to significant effects such as melting ice, rising sea levels, and changes in wildlife distributions. To combat global warming, individuals can reduce energy consumption, recycle, and implement sustainable practices.

1. Global Warming
And Its Effects

2. What is Global Warming?
It is the phenomenon that
shows an average rise in the
temperature of the Earth’s
atmosphere and oceans in
recent decades.
Global Warming 2

3. Causes of Global Warming
• Variations in solar activity
• Fluctuations in ocean currents
• Volcanic eruptions
• Greenhouse gases
Global Warming 3

4. The Greenhouse Effect
The "greenhouse effect" is the
warming that happens when
certain gases in Earth's
atmosphere trap heat. These
gases let in light but keep heat
from escaping, like the glass
walls of a greenhouse.
Global Warming 4

5. The Greenhouse Effect Explained
Global Warming 5

6. A Reality in Pictures
• Glacier National Park, USA 1932
• Glacier National Park, USA 1988
Global Warming 6

7. A Reality in Pictures
• Peru, 1980
• Peru, 2002
Global Warming 7

8. A Reality in Pictures
• Kilimanjaro, 1970
• Kilimanjaro, 2000
Global Warming 8

9. A Reality in Pictures
• Nepal, 1978
• Nepal, 2004
Global Warming 9

10. A Reality in Pictures
Even more obvious from space, these
pictures of the North Polar cap from
NASA show a melting of 25% in 25
years.
Global Warming 10

11. Effects of Global Warming
• Ice is melting worldwide, especially at the Earth’s
poles. This includes mountain glaciers, ice sheets
covering West Antarctica and Greenland, and Arctic
sea ice.
• Researcher Bill Fraser has tracked the decline of the
Adélie penguins on Antarctica, where their numbers
have fallen from 32,000 breeding pairs to 11,000 in
30 years.
• Sea level rise became faster over the last century.
Earth after global • Some butterflies, foxes, and alpine plants have
warming moved farther north or to higher, cooler areas.
• Precipitation (rain and snowfall) has increased
across the globe, on average.
Global Warming 11

12. Future Effects of Global Warming
• Other effects could happen later in the century, if warming continues.
Sea levels are expected to rise Hurricanes and other storms are Floods and droughts will become
between 7 and 23 inches (18 and 59 likely to become stronger more common
centimeters)
Global Warming 12

13. What Should We Do?
By using energy wisely, we could help reduce the demand for fossil fuel,
which in turn could reduce the global warming. We can do the following:
• Reduce, • Use the “Off”
Reuse, Recycle switch
• Change a light • Plant a tree
bulb
Global Warming 13

14. Stop Global Warming
Global Warming 14

15. Sources
• http://environment.about.com/od/faqglobalwarming/f/globalwarming.htm
• http://www.wwf.org.au/our_work/people_and_the_environment/global_war
ming_and_climate_change/
• http://en.wikipedia.org/wiki/Global_warming
• http://en.wikipedia.org/wiki/Effects_of_global_warming
• http://environment.about.com/od/faqglobalwarming/f/globalwarming.htm
• http://environment.nationalgeographic.com/environment/global-warming/
• http://www.youtube.com/watch?v=ROZJmX73FF4&feature=related
• http://www.youtube.com/watch?v=kkuxXP2kIm8&feature=related
• http://www.youtube.com/watch?v=Jxi-OlkmxZ4
• http://environment.about.com/od/globalwarming/tp/globalwarmtips.htm
Global Warming 15