Data Scenario One: Carbon dioxide emissions stay the same:
• Set the carbon dioxide emissions rate to 9.8 gigatons.
• Set the time step size to 10 years.
• Select step forward until you have the data through the year 2110.
• Record the data in the table below.
Scenario Two: Carbon dioxide emissions decrease:
• Set the carbon dioxide emissions rate to 9.8 gigatons.
• Set the time step size to 10 years.
• Select the step forward button once.
• Decrease the carbon dioxide emissions by 0.2 and press step
forward.
• Continue stepping forward once, decreasing the carbon emissions
each time, until you reach 2110.
• Record the data in the table below.
Year Carbon Emissions
(gigatons)
Temperature
(Fahrenheit)
1960 4.2 57.2
1970 5.8 57
1980 6.2 57.4
1990 7.8 57.6
2000 8 58
2010 9.8 58
Maintain carbon dioxide emissions at 9.8 for the
rest of scenario one.
2020
2030
2040
2050
2060
2070
2080
2090
2100
2110

Scenario Two: Carbon dioxide emissions decrease:
• Set the carbon dioxide emissions rate to 9.8 gigatons.
• Set the time step size to 10 years.
• Select the step forward button once.
• Decrease the carbon dioxide emissions by 0.2 and press step
forward.
• Continue stepping forward once, decreasing the carbon emissions
each time, until you reach 2110.
• Record the data in the table below.

Year Carbon Emissions
(gigatons)
Temperature
(Fahrenheit)
1960 4.2 57.2
1970 5.8 57
1980 6.2 57.4
1990 7.8 57.6
2000 8 58
2010 9.8 58
Decrease carbon dioxide emissions by 0.2 each
step forward for the rest of scenario two.
2020
2030
2040
2050
2060
2070
2080
2090
2100
2110
Year Carbon Emissions
(gigatons)
Temperature
(Fahrenheit)
1960 4.2 57.2
1970 5.8 57
1980 6.2 57.4
1990 7.8 57.6
2000 8 58
2010 9.8 58
Increase carbon dioxide emissions by 0.2 for each
step forward for the rest of scenario three.
2020
2030
2040
2050
2060
2070
2080
2090
2100
2110