Global warming is caused by increasing levels of greenhouse gases like carbon dioxide and methane in the atmosphere from human activities like burning fossil fuels and deforestation. This traps more heat from the sun and warms the planet. Effects of global warming include rising sea levels as ice sheets melt, which threatens coastal areas, and more severe storms due to rising ocean temperatures. Pictures show devastating effects of storms and melting ice sheets that demonstrate the dangers of unchecked climate change. We must take action to reduce greenhouse gases and protect the planet for future generations.
6. Basic Questions of Global Warming
1. What causes the earth’s climate
to change?
2. What are the effects of Global
Warming to humanity?
3. How do we overcome this
problem?
7. Green house gases acts like a mirror which
reflect a part of heat radiation back to the
earth.
8. The sun sends out energy as
heat and light. This energy
comes to our earth during the
day time.
Some of the sun’s rays get
‘trapped’ in the atmosphere.
Some of them get reflected back
into space.
The ones which get through the
atmosphere warm the earth up.
9. What is the atmosphere and why does
it trap heat?
The atmosphere is the air around the
surface of the earth. It is made from a
mixture of gases. We need it for animals
and plants to survive.
Some of the gases act like a blanket,
trapping heat. These gases are called
‘greenhouse gases’.
This is known as the ‘Natural
Greenhouse Effect’. Without it, the earth
would be much colder.
(the atmosphere is
really much thinner
than it looks above)
10. So why is global warming happening?
(the atmosphere is
really much thinner
than it looks above)
Some things that people do are
increasing the amounts of the
greenhouse gases in the atmosphere, so
more heat is trapped.
The heating of the earth through human
activities is called the ‘Enhanced
Greenhouse Effect’ and this is causing
the earth to heat up, or global warming.
Global warming doesn’t just mean that
the earth gets hotter, it means that the
whole climate is changing.
11. Which gases in the atmosphere trap heat?
The atmosphere is made of 78% Nitrogen and 21% Oxygen.
But these gases don’t trap heat and cause global warming or
climate change.
What % of the atmosphere is left?
The gases which trap heat make up less
than 1% of the atmosphere! They are
called the ‘greenhouse gases’.
The main greenhouse gases are:
Carbon dioxide
Methane
Nitrous oxide
Ozone
Water vapour
Halocarbons
Human activity
increases the
amount of these
gases in the
atmosphere
12. How do humans increase carbon dioxide levels in the
atmosphere?
Burning fossil fuels releases
the carbon dioxide stored
millions of years ago. Most of
the increased carbon dioxide
comes from fossil fuels
Deforestation releases the
carbon stored in trees. Less
trees also means less carbon
dioxide can be removed from
the atmosphere.
14. Q1 Answers.
1. Green House Effects
Example : carbon dioxide (CO2), Methane,
Ozone, Nitrous oxide, Sulfur Hexafluoride,
Hydrofluorocarbons and etc.
15. Fig. 1: Cause for global warming: Carbon dioxide emissions in million tons per year
over the last 200 years. (graph taken from
http://www.globalwarmingart.com/wiki/Image:Global_Carbon_Emission_by_Type
_png)
16. Fig 3: From which sectors do the major greenhouse gas emissions come from? The lower part of the
picture shows the sources individually for the gases carbon dioxide, methane and nitrous oxide,
respectively. (Graph from http://en.wikipedia.org/wiki/Image:Greenhouse_Gas_by_Sector.png)
19. In Other Words, It is an activity of cutting out
trees in the forests in with the
purpose of development of
that particular place,
resourcing the raw material to
process goods like papers.
20. Therefore, Massive deforestation could lead to
less carbon dioxide (CO2) being
absorbed (for photosynthesis
process) and causing much more of
the greenhouse gases in the
atmosphere.
21. Hmm.. I wonder how it
looks like when a forest is
completely destroyed.
25. Effects
1. Rise In Sea Levels Worldwide
This happens due to
the melting of two
massive ice sheets
in Antartica and
Greenland
26. Brown’s (2008) study indicates that
if the Greenland ice sheet were to
melt, it would raise the sea level up
to 7 meters while the melting of
West Antartic ice sheet would raise
the sea level 5 meters. Even just a
partial melting would have dramatic
changes on the sea level
33. Effects
2. More Killer Storms
The severity of storms
such as hurricanes and
cyclones is increasing,
and research published
in Nature found that
(quoting) :
34. “Scientists have come up with the
firmest evidence so far that global
warming will significantly increases the
intensity of the most extreme storms
worldwide. The maximum wind speeds
of the strongest tropical cyclones have
increased significantly since 1981,
according to research published by
Nature this week. And the upward
trend, thought to be driven by rising
ocean temperatures, is unlikely to stop
at any time soon”
35. Wow! That sounded
like the it really is
dangerous! We got pictures for this one
to show you too.
40. Hi, my name is Friday and I
have a conclusion of all this
mess for you.
The earth is too old to stand
up through this phenomena.
Therefore, we, as the khalifa
living in it are responsible to
ensure the beauty of the world
can be enjoyed by our kids in
the future. If we, as the soon-
to-be-forefathers do not find a
way to overcome this problem,
imagine how would the future
generation survive with a
climate that is hotter than it
already is now?
