The purpose of this digital learning object is to show the potential increase in carbon emissions until the year 2100. The applet will challenge the user to determine if global anthropogenic climate change can be mitigated with technologies that exist today.

Using the menu tabs at the top of the screen, you can predict the extent of certain technologies in 2100, and see what impact that could have on global carbon emissions. Note that the values on the sliders represent values predicted for 2100, not today's values.

As you adjust the sliders, the projection arrow on the Projected Carbon Emissions graph will move. The starting position of the arrow on the top of the yellow triangle represents the current trajectory if no technological advances or behavioral changes are made. Try to bring the projected carbon emissions down until the arrow reaches the bottom of the yellow triangle.

As you change the sliders, keep an eye on the Reality Check bar in the lower left corner. This bar will turn green if your predictions for 2100 are reasonable, and red if they're not.

This instructions page can be accessed from the menu bar, using Help → Instructions.
Total Amount of Electricity Needed (TWh/y)

Percent of Electricity from Natural Gas

Efficiency of Coal Plants (%)
Percent of Fossil Fuel Power Plants with Installed CCS

Percent of Electricity from Wind

Percent of Electricity from Solar

Percent of Electricity from Nuclear

Percent of Electricity from Geothermal

Percent of Electricity from Hydroelectric

Number of Cars (in Billions)
Gasoline Fuel Consumption (L/100km)
Average Distance Driven (km)
Percentage of Cars Using Biofuel

Percentage of Cars Using Liqufied Natural Gas (LNG)

Percentage of Cars Using Hydrogen Fuel Cells

Percentage of Cars that are Electric

Deforestation Rate (thousands of km2/y)

Conservation Tilled Farmland (million km2)

Total Floor Area of Buildings (billions of m2)
Carbon Emission During Construction (kgC/m2)
Average Lifetime of Buildings (years)
Number of Lights (in Billions)
Percentage of Lighting by LED Bulbs
Carbon Emissions from Heating and Cooling (kgC/m2)
Vehicle Efficiency and Use
Reality Check
not realistic
Show Assumptions
What's This?
What's This?
Climate Effects
Projected Carbon Emissions
Note: the sliders represent values predicted for the year 2100.
Nat. Gas
Sources of Electricity:
Fuel Cell
Types of Vehicle Fuel: