Download - Explanation by raisra a global warming
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Tugas Bahasa Inggris
•Raisra Primira
•XII IPA 2
•32
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What is global warming?
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How Global Warming Works
Fossil fuels (coal, oil, natural gas)
Carbon Dioxide (CO2)
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The Sun’s energy passes through the car’s windshield.
This energy (heat) is trapped inside the car and cannot pass back through the windshield, causing the inside of the car to warm up.
Example of the Greenhouse Effect
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What’s the difference between “global warming” and
“climate change”?
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DifferenceGLOBAL WARMING
is the increase of the Earth’s average surface temperature due to a build-up of greenhouse gases in the atmosphere.
CLIMATE CHANGE is a broader term that
refers to long-term changes in climate, including average temperature and precipitation.
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Effects of Global WarmingIncreased Temperature
Habitat Damage and
Species Affected
Changes in Water Supply
Rising Sea Level
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What’s the proof that global warming is taking place?
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Portage Glacier
1914 2004
• Alaska
Photos: NOAA Photo Collection and Gary Braasch – WorldViewOfGlobalWarming.org
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Colorado River• Arizona
June 2002 Dec 2003
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Why is global warming happening?
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Burning of Fossil Fuels
Pollution from coal, natural gas, and oilPollution from coal, natural gas, and oilPollution from coal, natural gas, and oil
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When did global warming start?
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Global Atmospheric Concentration of CO2
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How is global warming measured?
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Ice Core DataIce Core Data
COCO22 Measurements Before 1958 - Antarctica Measurements Before 1958 - Antarctica
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CO2 Atmospheric Measurements
CO2 Measurements Since 1958 – Mauna Loa, Hawaii
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Temperature (Northern Hemisphere) CO2 Concentrations
1000 Years of CO2 and Global Warming
De
gre
e
Ce
lsiu
s I
nc
rea
se
Pa
rts
Pe
r M
illi
on
Year Year
10
00
1200
1400
1600
1800
2000
1000
1200
1400
1600
1800
2000
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Global Warming:Global Warming:
Shifting GearsShifting Gears
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2007
Goal: Reductions in CO2 Per Year
Bill
ion
s o
f M
etri
c T
on
s C
arb
on
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2007Reductions
in CO2
Per Year
Gig
ato
n C
arb
on
Produce electricity efficientlyUse electricity efficientlyVehicle efficiencySolar and Wind PowerBiofuelsCarbon capture and storage
Bill
ion
s o
f M
etri
c T
on
s C
arb
on
Our Goal
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What’s being done now to reduce our emissions?
Solar Power Wind Power Fuel-Efficiency
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What can you do to help What can you do to help solve the problem?solve the problem?
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Simple Things To Do
Turn off your computer or the TV when you’re not using it.
Take shorter showers. Heating water uses energy.
Keep rooms cool by closing the blinds, shades, or curtains.
Turn off the lights when you leave a room.
Use compact fluorescent bulbs.
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Be Bulb Smart—Use CFLs
IncandescentCompact
Fluorescent
500 lbs. of coal
What’s the difference?
•1,430 lbs. CO2 pollution avoided
•$30 saved
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Simple Things To Do
Dress lightly when it’s hot instead of turning up
the air conditioning. Or use a fan.
Dress warmly when it’s cold instead of turning up the heat.
Offer to help your parents keep the air filters on
your AC and furnace clean.
Walk short distances instead of asking for a ride in the car.
Plant a tree. Recycle.
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© National Wildlife Federation, 2007