Transcript Greenhouse Effect

Kate Tracey
Grace Tita
Amanda Richey
What is it?
 A naturally occurring
and necessary process
that warms the Earth.
Why is the greenhouse effect
necessary?
 The gases trap in heat that the Earth’s inhabitants
need to survive
 Without the greenhouse gases the Earth would be 86
degrees Fahrenheit cooler at all times.
Can it be a bad thing?
 Yes…
 Too many greenhouse gases can cause extra heat to be
trapped within the Earth’s atmosphere.
 This causes the Earth’s temperature to rise, which in
turn, affects many other things.
Average Global Temperature by Decade, 1880-2004
Decade
Avg Temp (Degrees C)
1880-1889
13.82
1890-1899
13.69
1900-1909
13.74
1910-1919
13.79
1920-1929
13.91
1930-1939
14.02
1940-1949
14.05
1950-1959
13.98
1960-1969
13.94
1970-1979
14.01
1980-1989
14.26
1990-1999
14.40
2000-2007
14.64
What makes up the Earth’s Atmosphere?
 78% Nitrogen
 21% Oxygen
 1% Greenhouse Gases
 Carbon Dioxide
 Methane
 Water Vapor
 Ozone
What are the natural sources of
greenhouse gases?
• Carbon Dioxide
• Humans and Animals Breathing
• Volcanoes
• Methane
• Cattles Digesting Food
• Rice Fields
• Ozone is naturally occurring
What are the man-made sources of
greenhouse gases?
 Methane
 Released from buried waste
 Coal mining
 Carbon Dioxide
 Burning of coal, oil, and gas
 Cutting down trees
What things are affected?
 The weather
 Hotter summers
 Possible temperature change year round
 Water
 Changes in rain fall patterns
 Farming
 Weather patterns affect crops
 Sea Levels
 Melting ice
 Warmer oceans
What can be done to slow down
global warming?
 Plant more trees
 Recycle
 Reduce man-made emissions
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Solar Power
Hydro Power
Wind Power
Carpool, bike, walk
Use power carefully
Sources
 Greenhouse effect picture
http://www.whrc.org/resources/online_publications/
warming_earth/the_greenhouse_effect.htm
 Global temp and CO2 concentration data
Source: Goddard Institute for Space Studies, NASA
Goddard Space Flight Center Earth Sciences
Directorate, "Global Temperature Anomalies in .01 C,"
at data.giss.nasa.gov/gistemp/tabledata/GLB.Ts.txt,
updated January 2008