# Pages Colby Carbon Footprint Energy of stuff Page History

## Key

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Electronics:

As a group, we brought 174.9 kg of electronics to Colby.  This equates to 1224.3 kg of carbon dioxide used to make our electronics.

When converted into kg of gasoline, it turns out that each of us uses approximately 24 kg of gasoline to make our electronics-- the equivilent of 8.9 gallons of gasoline per person. This is over half a tank of gasoline for most cars!

Clothing:
We had thirteen people in our COOT group so we took the weight of thirteen people's clothing to get a total of 439kg of clothing. The average of that total was 33.7kg which we used to calculate the average of CO2 used to produce that clothing, 404.4kgCO2 (Using the estimation of 12gCO2/gClothing). Because we did have thirteen people altogether we used 5257.2kgCO2 as a group which equals about 1752.4kgGasoline (461.2gallons).

School Supplies:
The mass of school supplies that fifteen people reported on our data table was 64.5 kg.  Assuming that it took about 5 g of a CO2 equivelent to make a gram of product, we found that we had produced about 322.5 kg of CO2, thus burning about 107.5 kg of gasoline.  However, we had to assume that the average student did not bring all of their supplies to Colby.  Buying text books on campus, which are incredibly heavy, would change our numbers.  After polling a few students, we decided the closest approximation would be to multiply the 64.5 kg brought buy 3 in order to extrapolate the total mass of text books.  Once we calculated 967.5 kg of co2 produced for our projected mass, we multiplied by 13/15 to find 838.5 kg of co2 produced for our coot group.  So within our group, we burned approximately 279.5 kg of gasoline.

Furniture:
We calculated the total mass of all the furniture that we brought up. It came to 182.1 kg. Then we broke the total down into subgroups, and estimated how much wood, plastic, metal, fabric, and paper was used in manufacturing said furniture. We came up with 128.1 kg of wood which translates to 640.5 kg of CO2, 24.3 kg of plastic which is 194.4 kg of CO2, 25 kg of fabric which is 275 kg of CO2, 5.2 kg of paper which is 31.2 kg of CO2, and 3.5 kg of metal which is 21 kg of CO2. This came to a total CO2 emissions of 1162.1 kg of CO2, which means there were approximately  387.36 gallons of gasoline used in producing the furniture.

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Transportation:

Cars

- 80% of cars are metal (mostly steel)

- 20% plastics and other materials

Mass of average car - 1000kg                                         (800kg steel and 200kg plastics)

Energy to make 1kg of steel - 30MJ/kg                            (800kg)(30MJ/kg) = 24000MJ

Energy to make 1kg of plastics - 160MJ/kg                     (200kg)(160MJ/kg) = 32000MJ

Energy to assemble car -                                                                                ++ 20000MJ+

76000MJ = 422 gallons of gas (180MJ = 1 gallon of gas)

(422 gallons)(12 cars) = 5064 gallons of gas for everyone's car

5064 gallons of gas = 43643 kg CO2 produced to make our cars

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