this is a social science ppt on global warming. made abt a few month ago. I hope you d lyk it good! enjoy let me know wat do you think abt this ppt.

1. WARMING UP THE WORLD

2. 1. What Is Global Warming
2. Cause Of Global Warming
3. Climatic Changes
4. Earth’s Temperature - 1
5. Earth’s Temperature - 2
6. Effects Of Global Warming
7. Worldwide Carbon Emission
8. Effects On Sea
9. Effects In The Arctic
10. Reduction Of Snow Due To Global Warming
11. Trends
12. Green House Effects
13. References

4. Causes Of Global Warming
• Humans are emitting more carbon dioxide in the atmosphere, faster than the absorbing rates of plants and the
oceans.
• The consumption of fossil fuels in last few decades has contributed much to the degradation of our environment.
Global warming, climate change, extinction of wildlife species, depletion of ozone layer, and increase in air
pollution are few of the problems from which our environment is suffering. It may be quite a task for anyone to
find some solid global warming facts to alarm for some action.
• There has been a tremendous increase of water vapor, carbon dioxide, methane nitrous oxide and especially
greenhouse gases due to polluting substances emitted as a result of industrialization, pollution, deforestation.
• In the last 30 years, the average consumption of fossil fuel by United States has been 80%. Fossil fuels are the
most dangerous contributors to global warming.
• Pollution from coal, natural gas and oil.
• Population and deforestation.

6. Radiation
Cooling
Solar
Energy
Sun

7. Radiation
Cooling
Solar
Energy
Sun

8. Effects Of Global Warming
• Global warming can lead to massive food and water shortages and has a life threatening impact on the wildlife.
• More than 1 million species have become extinct due to disappearing habitats, ecosystems acidic oceans all caused
due to global warming.
INDUSTRIALISATION
• Due to industrial revolution, the burning of fossil fuels like coal, oil and gas started on a massive scale. This not only
increased greenhouse gases but was also responsible for large scale deaths due to asthma and other respiratory
diseases.
• Since the industrial revolution in 1700, the level of carbon dioxide on earth has increased by 34%.

9. Carbon(109metrictons)
0
1
2
3
4
5
6
7
8
Liquid fuel
Total
Gas fuel
Solid fuel
1750 1800 1850 1900 1950 2000
Year

11. Effects In The Artic
• The ecosystem which sustains the livelihood of Arctic residents is melting the ice as temperature rise.
• The layer of permafrost is melting, causing an inland lake to drain into the ocean and killing fresh water fish.
• Since the beginning of industrialization the temperature difference between the hemispheres has increased due to
melting of sea ice and snow in the North. Average arctic temperatures have been increasing at almost twice the rate
of the rest of the world in the past 100 years; however arctic temperatures are also highly variable. Although more
greenhouse gases are emitted in the Northern than Southern Hemisphere this does not contribute to the difference
in warming because the major greenhouse gases persist long enough to mix between hemispheres
• The Arctic is one of the worst places to be effected by global warming.
• According to the multinational Arctic Climate Impact Assessment report compiled between 2000 and 2004, the
average temperature in Alaska, Western Canada and Russia have risen at twice the global average.
• The Arctic ice is melting rapidly. By 2040 the region is expected to have a completely ice free summer, or even earlier.
• The Montana Glacier National Park has only 25 glaciers instead of 150 that were there in the year 1910.
• Melting of glaciers will cause sea levels to rise on one hand and water shortages in areas that depend on natural
sources of water

14. Green House Effects
• Emissions like carbon dioxide, nitrous oxide and other greenhouses gases will remain in the atmosphere for many years
making impossible to eliminate global warming for several decades
• The rate at which carbon dioxide is being dumped in to the environment is 1000 tons per second until the 2011 records
• The carbon dioxide levels in the 20th century have been highest in 650,000 years.
• Till 1950, the levels rose by 11% and recently the levels have risen by 40%.
• The heat trapping gases have been increasing in the atmosphere at an alarming rate.
• The presence of large number of these gases has resulted in enhanced greenhouse effect. Heat waves caused by global
warming is responsible for many heat related illness and deaths.
• Greenhouse Gases called carbon dioxide, methane, water vapour and other gases have heat trapping capacity and are
needed to create greenhouse effect that keeps the earth warm which is required to support plants, animals and
humans. Some of these greenhouse gases occur naturally while other are released in tons of capacity every year all
over the world by us.
• These gases are released when we drive cars, burn wood or coal, large power plants. Deforestation(cutting down of
forests) is also a reason for the greenhouse gases because fewer trees means less carbon di oxide converted to oxygen.
Now, when accumulation of these greenhouse gases grows, more heat gets trapped into the atmosphere and as a result
few heat escapes backs into the space and it heat ups the earth surface.

16. 1. www.conserve-energy-future.com
2. www.wikipedia.com
3. www.climatehotmap.org
4. www.nmsea.org
5. www.nrdc.org
6. www.dosomething.org
7. www.news.nationalgeographic.com
8. www.britannica.com
9. www.study.com