Homes are responsible for more than 20% of energy consumption in the United States. But how do you pinpoint the sources of all that CO2? An impressive new data-visualization tool  from GE  and Pentagram's Lisa Strausfeld , who knows from  information design , helps determine precisely which household electronics do the most damage.
"The hardest challenge was finding the right data, and making it engaging--ie, What the hell is a watt?" says Strausfeld. "It started out as a visualization of home energy consumption across the U.S. and became, essentially, a calculator."
The tool starts with a grid of all the energy-suckers you'd find in your house, arranged in order of how power hungry they are. Then, you can rearrange that grid a few different ways--the most important being cost over time. Click that view, and you can pick a time frame (day, month, year) and the state where you live. Finally, clicking on each appliance reveals stats about how expensive it is to run.
So blasting the AC in California checks in at $700 a year, and running the fridge in South Carolina sets you back $158.
If an appliance has a green star next to it, that means it's available in an Energy Star model. The tool can tell you how quickly the Energy Star option pay offs. (Three years, in the case of the fridge.)
The point, for Strausfeld, is that even though we consume so much energy at home, we don't understand how our behavior contributes to that fact: "Energy consumption in the home is relatively opaque. But by attaching some new stigmas to old, “gas-guzzling” appliances, our hope is that Americans become as familiar with kilowatt hours as they are to degrees Fahrenheit."
The project is the latest in a grand series of infographics GE has been producing, in an effort to teach people about how to consume resources more wisely. For example, Ben Fry created a health-care calculator here , which shows the cost of getting sick. David McCandless created another showing how fitness helps work performance . And Thomas Porostocky, working with GOOD magazine, showed the affordability of health care .