Comparing two electricity-use scenarios
A fictional facilities exercise compares a baseline annual electricity use of 100000 kilowatt-hours with a proposed annual use of 80000 kilowatt-hours for the same stated service. It supplies an emissions factor of 0.4 kilograms per kilowatt-hour for both scenarios and asks only for modeled electricity-related emissions. The exercise does not include manufacturing, disposal, changed usage or any future change in the grid factor. A manager claims the result proves zero environmental impact across the entire life cycle. The analyst must calculate the defined operational difference and explain why a result for one boundary is not a complete life-cycle assessment or an independently verified forecast.
1. Calculate the modeled reduction.
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The use reduction is 20000 kilowatt-hours; multiplying by 0.4 gives 8000 kilograms of electricity-related emissions avoided under the stated assumptions.
2. Evaluate the wider claim.
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The calculation covers the defined operational boundary only. Manufacturing, disposal and other effects require separate evidence before making a whole-life claim.