Carbon Basics Check

Knowledge check

1. A footprint is quoted in tonnes of CO₂e rather than plain CO₂ because:
European reporting conventions require the equivalent notation on all disclosuresOther greenhouse gases are counted too, weighted by their global warming potentialCO₂ tonnages alone would be too small to communicate meaningfully to boardsThe 'e' denotes estimated, distinguishing modelled figures from measured ones
2. A company's owned diesel vans, its purchased electricity, and its subcontracted haulage fall respectively into:
Scopes 2, 3 and 1Scopes 1, 3 and 2Scopes 3, 2 and 1Scopes 1, 2 and 3
3. Converting energy into emissions uses the formula:
Emissions = activity data × emission factor, with the factor matched to the reporting yearEmissions = energy cost × the carbon price prevailing in the UK Emissions Trading Scheme for the reporting yearEmissions = activity data ÷ the plant's efficiency, summed across all fuelsEmissions = benchmark intensity × floor area, adjusted for degree days
4. The UK grid electricity emission factor falls almost every year, which means:
Older electricity data cannot be used in any current footprint calculationGas heating becomes relatively more carbon-intensive than the same heat from electricity over timeAn unchanged electricity bill delivers a shrinking footprint through no effort of the reporter'sCompanies should delay reporting to benefit from the following year's lower factor
5. For most organisations, the largest share of scope 1 and 2 emissions comes from:
Business flights and hotel stays booked through the travel systemWater supply and the treatment of trade effluentPurchased goods and services and the upstream supply chain behind everything the organisation buysMetered energy: the gas, fuel and electricity already on the energy manager's bills

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