What is it?
A naturally occurring
and necessary process
that warms the Earth.
Why is the greenhouse effect
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?
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)
What makes up the Earth’s Atmosphere?
1% Greenhouse Gases
What are the natural sources of
• Carbon Dioxide
• Humans and Animals Breathing
• Cattles Digesting Food
• Rice Fields
• Ozone is naturally occurring
What are the man-made sources of
Released from buried waste
Burning of coal, oil, and gas
Cutting down trees
What things are affected?
Possible temperature change year round
Changes in rain fall patterns
Weather patterns affect crops
What can be done to slow down
Plant more trees
Reduce man-made emissions
Carpool, bike, walk
Use power carefully
Greenhouse effect picture
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,"
updated January 2008