Transcript Global warming

Global warming
By:
Khalid Alarji
Raid Alqahtani
Abdulaziz Alaqeel
Omar Aldowesh
Ali Alfirtish
201102016
200801312
200801227
200901888
201002559
Outline
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Global Warming
Causes of global warming
effects of global warming
Solutions
Global warming
• Global warming is the rise
in the average temperature of
Earth's atmosphere.
• Earth's mean surface
temperature has increased by
about 0.8 °C (1.4 °F)
• The temperature rise due to
increasing in greenhouse
gases.
• water vapor, carbon dioxide
(CO2), methane (CH4),
nitrous oxide (N2O) and ozone
(O3)
Natural Causes of global warming
• created by nature:
• One natural cause is a release
of methane gas which is a
greenhouse gas. 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.
Man-made Causes
Man-made causes do the most
damage:
1. Pollution:
is the biggest problem_
Pollution comes in many
shapes and sizes.
2. Fossil fuels :
burned they give off a green
house gas called CO2.
3. mining coal and oil allows
methane to escape
• 4. population:
More food- more
transportation- more CO2
Effects of Global Warming
already happening:
• Ice is melting worldwide,
especially at the Earth’s poles.
• Sea level rise became faster
over the last century.
• some butterflies, foxes, and
alpine plants have moved
farther north or to higher,
cooler areas
• Precipitation (rain and
snowfall) has increased across
the globe, on average
Effects of Global Warming
Other effects could happen later this century, if warming continues:
• Sea levels are expected to rise between 18 and 59 centimeters by the end of the
century, and continued melting at the poles could add between 10 to 20
centimeters.
• Hurricanes and other storms are likely to become stronger.
• Species that depend on one another may become out of sync. For example,
plants could bloom earlier than their pollinating insects become active.
• Floods and droughts will become more common. Rainfall in Ethiopia, where
droughts are already common, could decline by 10 percent over the next 50
years.
• Less fresh water will be available. If the ice cap in Peru continues to melt at its
current rate, it will be gone by 2100
• Some diseases will spread, such as malaria carried by mosquitoes.
Solutions
• Replacing the fossil fuel into a
clean energy like solar energy
• Reducing the use of energy
• stop adding carbon dioxide to
the greenhouse gases in the
atmosphere.
• reduce environmental
pollution
• Reduce the use of transports
• use well-insulated buildings
Conclusion
• Global warming is the rise in the average
temperature of Earth's atmosphere.
• release of methane gas and earth goes through a
cycle of climate change are the natural causes
• Pollution, fossil fuels ,and high population are
the man cause of global warming
• There are many of effects that happened already
like melting ice.