Global warming refers to the long-term rise in the average temperature of the Earth's climate system, which can be caused by both natural and human factors. The document discusses evidence of global warming such as rising sea levels and ocean temperatures, shrinking ice sheets and glacial retreat. It also notes that scientific organizations agree human activities like burning fossil fuels are the primary driver of the current warming trend. The document provides tips to mitigate global warming through reducing energy use, changing buying and transportation habits, and stopping deforestation.

1. Global Warming
Reported by:
Franklin Kan Go （林志強）

2. Global Warming
• Global warming is an average increase in the
temperature of the atmosphere near the Earth’s
surface and in the troposphere, which can
contribute to changes in global climate
patterns. Global warming can occur from a
variety of causes, both natural and human
induced. In common usage, “global warming”
often refers to the warming that can occur as a
result of increased emissions of greenhouse
gases from human activities.

3. Global Warming
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4. Global Warming
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5. Appliances That Cause Global
Warming
• A good rule of thumb is that household
appliances consume electricity and therefore
contribute to global warming in proportion to
the amount of heat they produce, because the
production of heat is what usually requires the
most energy.

6. Appliances That Cause Global
Warming
Examples of Appliances That Cause Global Warming
• Electric Heaters
• Oil/Gas Heaters
• Hot Water Systems
• Air Conditioners
• Refrigerators
• Washing Machines
• Dish Washers
• Microwave Oven
• Incandescent Light Globes

7. Electric Heaters

8. Oil/Gas Heaters

9. Hot Water Systems

10. Air Conditioners

11. Refrigerators

12. Washing Machines

13. Dish Washers

14. Microwave Oven

15. Incandescent Light Globes

16. How do electrical appliances have an
affect on global warming?
Manufacturing them generally involves plastics made from fossil
fuels, which will eventually lead to increased atmospheric
CO2.
The manufacturing process generally involves the use of fossil
fuels (to mine metals, transport raw materials, and run
machines/equipment used to manufacture the final product)
Fossil fuels (usually gasoline/diesel) are most likely used to
transport the appliances to the point of sale.
If your electricity comes from coal or other fossil fuel sources,
using the appliance involves increasing the power company's
use of fossil fuels.
Burning or otherwise using fossil fuels increases atmospheric
CO2, which causes global warming.

17. Preventive Measures for Global
Warming
• As global temperatures rise, global warming is an increasing
concern. The current level of carbon dioxide in the atmosphere
is higher than it has been at any point in history, according to
NASA, and the rise in global temperatures is moving at a
faster rate than any point in the past 1,300 years. (See
References 1) Scientific organizations, including NASA and
the National Oceanic and Atmospheric Administration
(NOAA) agree that human behaviors and activities are a
primary cause of the warming trend. (See References 2) To
mitigate the existing damage and prevent global warming from
accelerating, you can take steps to reduce emissions associated
with your behaviors and lifestyle.

18. Preventive Measures for Global
Warming
• Reduce Energy Use
• Update Buying Habits
• Change Transportation Habits
• Stop Deforestation

19. Climate change: How do we know?
• Sea level rise
• Global temperature rise
• Warming oceans
• Shrinking ice sheets
• Declining Arctic sea ice
• Glacial retreat
• Extreme events
• Ocean acidification

20. Sea level rise
• Global sea level rose
about 17 centimeters
(6.7 inches) in the last
century. The rate in the
last decade, however, is
nearly double that of the
last century.

21. Global temperature rise
• All three major global surface
temperature reconstructions
show that Earth has warmed
since 1880. Most of this
warming has occurred since
the 1970s, with the 20 warmest
years having occurred since
1981 and with all 10 of the
warmest years occurring in the
past 12 years. Even though
the 2000s witnessed a solar
output decline resulting in an
unusually deep solar minimum
in 2007-2009, surface
temperatures continue to
increase.

22. Warming oceans
• The oceans have
absorbed much of this
increased heat, with the
top 700 meters (about
2,300 feet) of ocean
showing warming of
0.302 degrees
Fahrenheit since 1969.

23. Shrinking ice sheets
• The Greenland and
Antarctic ice sheets have
decreased in mass. Data
from NASA's Gravity
Recovery and Climate
Experiment show Greenland
lost 150 to 250 cubic
kilometers (36 to 60 cubic
miles) of ice per year
between 2002 and 2006,
while Antarctica lost about
152 cubic kilometers (36
cubic miles) of ice between
2002 and 2005.

24. Declining Arctic sea ice
• Both the extent and
thickness of Arctic sea
ice has declined rapidly
over the last several
decades.

25. Glacial retreat
• Glaciers are retreating
almost everywhere
around the world —
including in the Alps,
Himalayas, Andes,
Rockies, Alaska and
Africa.

26. Extreme events
• The number of record
high temperature events
in the United States has
been increasing, while
the number of record
low temperature events
has been decreasing,
since 1950. The U.S.
has also witnessed
increasing numbers of
intense rainfall events.

27. Ocean acidification
• Since the beginning of the
Industrial Revolution, the
acidity of surface ocean
waters has increased by
about 30 percent. This
increase is the result of
humans emitting more
carbon dioxide into the
atmosphere and hence more
being absorbed into the
oceans. The amount of
carbon dioxide absorbed by
the upper layer of the
oceans is increasing by
about 2 billion tons per year.

28. How long will it take for global
warming to destroy the Earth?
There are varied answers as to when Global
warming will destroy the Earth.
• Some say in the year 2050.
• Others say the Earth itself won’t be
destroyed but will become unsuitable for
life or uninhabitable because of the rapidly
shifting climate brought about by global
warming and the natural calamities that
come along with it.