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 Threats

Increasing thenumber of

extremeweather

Changing theEarth’s climate

system

 Theatmospher

e

hydrosphere

biosphere

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Main Causes

Biotic processes

Variations in solar radiation receied by Earth

!late tectonics

Volcanic eruptions

"uman actiities

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#rigin and e$ects of global

warming

rising temperatures (global warming)

changes in local

average climate

%se of fossil fuels &oil' coal' gas(

rising concentrations ofgreenhouse gas

changes in local weather

extremes 

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 Temperature

Since the Industrial )eolution &*+,-s(the globalaerage temperature has risen signi.cantly/

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 Temperature

Scientists hae high con.dence that global temperatures

will continue to rise for decades to come' largely due togreenhouse gasses produced by human actiities/

 The Intergoernmental !anel on Climate Change &I!CC('forecasts a temperature rise of 0/1 to *- degrees2ahrenheit oer the next century

Earth is getting warmer by irtually' and the temperaturehas been well aboe normal for more than 01 years/

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E$ects3 Snow and ice

Glacier National Park

1990 and 2008

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E$ect on people

Some places and someyears will be warmer or

cooler than aerage/Summers will get hotter'not only because of highertemperatures but alsobecause humilities willincrease/ That means that

heat waes' li4e the onethat 4illed 51'--- people inEurope in 0--5' willbecome more common/

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6hat we can do

)educe ehicle use

6al4 more

 Turn o$ heater or oen when we don’t need it

Buy recycle products or any products with a %/S/E!7 Energy Star label/

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https388www/youtube/com8watch9:""!;)h