An average home in the United States consumed about 12,773 kWh of electricity in

Question

An average home in the United States consumed about 12,773 kWh of electricity in 2005. The national average carbon dioxide emission rate for electricity generated in 2007 was 1,293 lbs of CO2 per megawatt-hour. Approximately 7% of the electricity generated is wasted due to losses in the transmission and distribution system.

How much CO2 was generated per year for an average U.S. home due to electricity use?

How much CO2 was emitted from household use of electricity if there were 111.1 million homes in the United States in 2005?

How much CO2 will be emitted from household use of electricity if there are 166 million homes in the United States in 2050?

Explanation / Answer

Total Energy for one household (assuming 7% is wasted) = 12,773 * 100/93 = 13734.40 KWh

Enegy required in MWh = 13734.40 KWh * 1 MWh/1000 KWh = 13.73440 MWh

a) CO2 generated by average US home

=> 13.73440 MWh * 1293 lbs/1MWh

=> 17758.57 lbs

b) Answer = Answer to part (a) * 111.1 million

=> 1972978.14 million lbs

b) Answer = Answer to part (a) * 166 million

=> 2947922. 26 million lbs

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