This document discusses global warming, including its causes and effects. It notes that global warming is driven by both natural factors like methane release and climate cycles, as well as human-caused pollution from burning fossil fuels which releases greenhouse gases. The effects of global warming include rising sea levels from melting ice caps and glaciers, and disrupted ecosystems making some species more vulnerable to extinction. Pictures are included showing effects like retreating glaciers over time.

1. Presented By :
HAWKAR OBIAD

2. Contents:
What is Global Warming? 
Causes of Global Warming. 
Effects of Global Warming. 
. 
Effects of Global Warming 
in the future.

3. Global warming relates to the 
increase in the average
temperature of the Earth's
surface that has been
observed in recent years,
and it is projected to
continue. It is debated as to
whether this is a natural
occurrence or whether
human activity has impacted
or accelerated it. ...

4. Global warming is caused by 
several things, which include
man-made or anthropogenic
causes, and global warming is
also caused by natural causes.
There are many causes, some 
are as follows:
Natural Causes 
Man-made Causes of Global 
Warming

5. Natural causes are causes 
that are created by nature.
One natural cause is a
release of methane gas from
arctic tundra and wetlands.
Methane is a greenhouse
gas and a very dangerous
gas to our environment. A
greenhouse gas is a gas that
traps heat in the earth's
atmosphere. Another natural
cause is that the earth goes
through a cycle of climate
change. This climate change
usually lasts about 40,000
years.

6. Man-made causes probably do 
the most damage to our planet.
There are many man-made
causes of global warming.
Pollution is one of the biggest
man-made problems. Pollution
comes in many shapes and
sizes. Burning fossil fuels is one
thing that causes pollution.
Fossil fuels are fuels made of
organic matter such as coal, or
oil.

7. Global warming will have serious impacts on the 
environment and on society. Higher temperatures will cause
a melting of ice in Greenland and Antarctica. This will
accelerate the rise of sea level. The speed at which global
warming is expected to occur in the 21st century is faster
than most plant and animal species will be able to cope with.
Some will adapt but others will suffer and may become
extinct.

8. If a picture is worth a 
thousand words …
Before the warming: 
Glacier National Park,
USA 1932
After the warming: 
Glacier National Park,
USA 1988

9. Before the warming: 
Peru, 1980
After the warming: 
Peru, 2002

10. Before the warming: 
Kilimanjaro, 1970
After the warming: 
Kilimanjaro, 2000

11. Before the warming: 
Nepal, 1978
After the warming: 
Nepal, 2004