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Scope 1, 2 and 3, explained properly.

Three words that appear in every framework you will file under. Get the classification wrong and everything downstream is wrong — and in Nigeria the boundary between them falls in an unusual place.
Scope 1

What you burn

Scope 2

What you buy as energy

Scope 3

Everything else you cause

Scope 3 categories

Fifteen

11 min read
Reviewed September 2026

Why emissions are divided at all

The division exists to stop double counting and to separate what you control from what you influence.

If every company simply reported all the emissions associated with its existence, the same tonne would be counted by the manufacturer, the distributor, the retailer and the customer. Aggregate the economy and you would get a number several times larger than reality.

So the GHG Protocol splits emissions by who controls the source. Scope 1 is what you control directly. Scope 2 is a special case for purchased energy, separated because almost every organisation has it and because it is not literally emitted at your site. Scope 3 is everything else in your value chain — which is deliberately allowed to overlap with other companies’ Scope 1, because your Scope 3 is somebody’s direct emissions and both of you should see it.

Scope 1 — what you burn

Direct emissions from sources your company owns or controls.

  • Stationary combustionFuel burned in fixed equipment: generators, boilers, furnaces, kilns, dryers. For most Nigerian companies, diesel generation is the single largest line in the entire inventory.
  • Mobile combustionFuel burned in vehicles you own or operate — fleet, cash-in-transit, plant, marine craft.
  • Process emissionsReleased by chemical reactions rather than combustion. Calcination in cement production is the classic case and frequently exceeds the fuel used to drive the kiln. If your process releases CO₂ chemically and your disclosure shows only fuel and electricity, you have missed it.
  • Fugitive emissionsUnintentional releases: refrigerant leakage from cooling systems, methane from gas infrastructure, SF₆ from electrical switchgear. Small volumes, occasionally large CO₂-equivalent figures.

Scope 2 — what you buy as energy

Scope 2 covers emissions from electricity, steam, heating or cooling that you purchase. You do not emit them; a power station does. They are counted as yours because your demand caused them.

Two methods exist. The location-based method applies an average grid factor for the system you draw from, which is what IFRS S2 requires. The market-based method reflects contractual instruments — a power purchase agreement with a specific generation profile, for example — and may be disclosed in addition where relevant.

For most Nigerian companies Scope 2 is the most tractable figure in the inventory: metered consumption, a bill as evidence, and one multiplication. If you can only get one number right in a first cycle, get this one.

The Nigerian boundary sits in a different place

Scope 3 — the fifteen categories

Eight upstream, seven downstream. You report those that are material and explain the basis for excluding the rest.

# Category Direction Typical Nigerian relevance
1 Purchased goods and services Upstream High — usually the largest upstream line
2 Capital goods Upstream Spikes in capex years
3 Fuel and energy not in Scope 1 or 2 Upstream Includes grid transmission losses
4 Upstream transport and distribution Upstream High — long inland distances
5 Waste from operations Upstream Data quality is the constraint
6 Business travel Upstream Easy to collect, rarely material
7 Employee commuting Upstream Often excluded with a stated reason
8 Upstream leased assets Upstream Situational
9 Downstream transport and distribution Downstream High for manufacturers and FMCG
10 Processing of sold products Downstream High for raw material producers
11 Use of sold products Downstream Dominant for fuels, vehicles, energy-using goods
12 End-of-life treatment Downstream Low to medium
13 Downstream leased assets Downstream Situational
14 Franchises Downstream Situational
15 Investments Downstream Dominant for banks, insurers, pension operators

The classification errors that cost the most

  • Generator electricity put in Scope 2The most common Nigerian error. You did not purchase that electricity — you made it. Fuel in a generator you own is Scope 1, always.
  • Process emissions omitted entirelyA cement, lime, glass, ceramics or chemicals producer reporting only fuel and electricity has missed a category that often exceeds combustion.
  • Contracted logistics put in Scope 1If you bought a transport service rather than the fuel, it is Scope 3 categories 4 or 9. Control decides it, not who paid.
  • Refrigerants forgottenFugitive releases from cooling are Scope 1 and are routinely missed, particularly in food, beverage and retail operations.
  • Scope 3 dismissed without assessmentDeclaring Scope 3 immaterial without a screening assessment is the claim most likely to be challenged, because for most companies it is the majority of the footprint.

Questions

Is double counting across scopes a problem?

Not for the integrity of your own inventory. Your Scope 3 is someone else’s Scope 1 by design — the value chain is counted more than once across the economy and that is how the framework works. What matters is that you do not double count inside your own boundary.

Do we have to report all fifteen Scope 3 categories?

No. You report the material ones and explain the basis for excluding others. IFRS S2 also gives relief from Scope 3 entirely in the first annual reporting period — use it to screen and start collecting, not to ignore it.

Which scope is a leased building?

It depends on your consolidation approach and the lease type. Under operational control, a building you operate is inside your boundary and its energy is your Scope 1 and 2. Under financial control the accounting treatment decides. Assets you lease out are category 13. State your approach and apply it consistently.

What about emissions we avoid or offset?

Reported separately, never netted off. Your gross Scope 1, 2 and 3 figures are reported as gross. Purchased carbon credits are disclosed separately with their type and quality, and avoided emissions are not part of an inventory at all.

Check this yourself

A summary of a regulation is not the regulation. These are the primary documents this page is based on.

The Greenhouse Gas Protocol Corporate StandardWorld Resources Institute and WBCSD
Corporate Value Chain (Scope 3) StandardGreenhouse Gas ProtocolDefines the fifteen categories and the accepted method for each.
GHG Protocol Scope 2 GuidanceGreenhouse Gas Protocol
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