Carbon Footprint, Net Zero and Greenhouse Gas Management

Carbon Management in Brief

Scope 1 direct emissions, Scope 2 purchased energy and Scope 3 value chain emissions follow the GHG Protocol. UK Net Zero by 2050 and SECR reporting for large businesses give the policy context.

Carbon Management and Net Zero

Ten years ago, carbon management was something large energy-intensive organisations worried about. Today it sits in pre-qualification questionnaires for modest public contracts, in customer sustainability demands for mid-sized suppliers, and in insurance and lending questions for almost everyone. An organisation without at least a basic grasp of its own emissions is increasingly at a commercial disadvantage - quite apart from the climate reasons for doing it.

Carbon management is the process of measuring greenhouse gas emissions, identifying where they come from, setting reduction targets, taking action and reporting the results. Net zero is the destination, where remaining emissions are balanced by equivalent removals, typically aligned to a long-term target year. Carbon neutral is a narrower claim, usually applied to offsetting current emissions without a reduction pathway behind it.

Scopes 1, 2 and 3

The Greenhouse Gas Protocol splits emissions into three categories, and this classification has become the common language of corporate carbon reporting.

Scope 1 - Direct emissions. Emissions from sources the organisation owns or controls. Fuel burned in company vehicles, gas for heating, process emissions, refrigerant losses (F-gases). Scope 1 is where most organisations start because it is the most directly measurable.

Scope 2 - Indirect energy emissions. Emissions from purchased electricity, steam, heating or cooling. The organisation uses the energy; the emissions happen at the power station or the district heating plant. Scope 2 is reported under two methods (location-based and market-based), with market-based reflecting any renewable energy contracts in place.

Scope 3 - Other indirect emissions. Everything else - emissions in the supply chain, business travel, employee commuting, waste disposal, use and end-of-life of products sold. Scope 3 is usually the largest of the three for most organisations, and also the hardest to measure. It is split into fifteen categories in the GHG Protocol.

Organisations new to carbon management often start with Scopes 1 and 2 and extend into the most relevant Scope 3 categories as capability grows. A carbon inventory does not have to cover everything from day one; it has to be honest about what it covers and the method behind the numbers.

UK Carbon Reporting Obligations

Several UK regimes already require carbon data disclosure and more are in the pipeline.

Streamlined Energy and Carbon Reporting (SECR). Large UK companies (meeting two of: 250+ employees, £36m+ turnover, £18m+ balance sheet) must report energy use and Scope 1 and 2 emissions in their annual directors' reports under the 2018 Energy and Carbon Report Regulations.

UK Emissions Trading Scheme. Applies to energy-intensive industrial activities and power generation above threshold. Permit holders must monitor, report and surrender allowances equal to their verified emissions.

PPN 06/21 - Carbon Reduction Plans. For UK central government contracts above £5m annual value, bidders must publish a Carbon Reduction Plan showing Scope 1, 2 and prioritised Scope 3 emissions, a net zero commitment by 2050, and demonstrable progress.

Outside these regimes, customers in retail, manufacturing and construction increasingly pass down similar requirements. What the regulations require directly for some becomes a commercial requirement in practice for many more.

Setting a Net Zero Target

A credible net zero commitment has a few recognisable ingredients. A baseline year and emissions inventory cover Scopes 1, 2 and the material Scope 3 categories. A target year - often 2050, sometimes earlier - defines when net zero will be reached. A reduction trajectory shows interim milestones, usually aligned to a 1.5 degree pathway. A plan describes the actions: energy efficiency, electrification, renewable procurement, fleet transition, supplier engagement. Residual emissions that cannot be eliminated are addressed through high-quality removals rather than avoidance-based offsets.

Organisations often underestimate the interim piece. A commitment to net zero in 2050 without credible milestones for 2030 and 2040 is not much more than a statement of intent. The Science Based Targets initiative (SBTi) has become the most common framework for verifying that a target is aligned with climate science; it is not mandatory but lends credibility.

P-110 sets out a template net zero policy that can be adapted. It sits alongside the environmental policy (P-2) rather than replacing it - net zero is a specific ambition within the broader environmental framework.

Carbon Management and the EMS

An ISO 14001 EMS is a natural home for carbon management. The aspects register captures energy use and emissions-generating activities as aspects. Objectives and targets (Clause 6.2) provide the framework for reduction goals. Legal and other compliance obligations (Clause 6.1.3) catch SECR, UK ETS and PPN 06/21 where they apply. Operational controls drive changes in purchasing, transport, maintenance and engineering. Monitoring (Clause 9.1) feeds data back into the inventory. Management review (Clause 9.3) takes progress as an input.

For organisations without ISO 14001, a standalone carbon management process can do the same job, but the EMS gives structure and discipline that carbon-specific processes often lack.

The most common mistake in carbon management is overreaching on the target without having the data. A net zero by 2030 claim from an organisation that cannot tell you its current emissions is going to look shaky under any scrutiny. The better path is: get your Scope 1 and 2 emissions measured honestly, extend into the major Scope 3 items, set a realistic baseline, and then build a target backed by a plan that identifies where the reductions actually come from.

Offsetting has its place for genuinely residual emissions, but it is not a substitute for a reduction plan. Regulators, customers and increasingly the Advertising Standards Authority are sceptical of claims where offsetting is doing most of the work.

Where carbon targets appear in a management system I audit, I look for the usual evidence: what is the baseline, what is the method, where are the numbers coming from, how has progress been tracked? A target without a verifiable baseline is weak. A baseline that does not reconcile with energy invoices and fuel records is weaker still.

For organisations caught by SECR or PPN 06/21 I also confirm the published data matches what sits in the management system. Mismatches between corporate disclosures and the internal management system are avoidable and always flagged.

Practical Compliance Guidance

IMS1 Sections 4 and 6 cover the context considerations that drive carbon management alongside aspects, objectives and compliance obligations.

The following alphaZ documents support carbon management and net zero commitments.

alphaZ document	How to use it
ISO 14001 Toolkit	The full EMS toolkit that supports carbon management through aspects, objectives, compliance and monitoring.
P-110 Net Zero Policy	Template net zero policy covering target year, scope, baseline and approach. Adapt to the organisation's commitments and publish alongside P-2.
P-2 Environmental Policy	The top-level environmental policy. Often updated to include climate change and carbon reduction commitments.
P-53 Sustainability Policy	Broader sustainability policy that can sit alongside P-2 and P-110 where the organisation has a wider commitment.
F-IMS38 Climate Change Review	Documents the organisation's climate change considerations under Clauses 4.1 and 4.2, including carbon exposure and reduction priorities.
F-ENV4 Environmental Aspects Register	Records energy use and emissions-generating activities as aspects, which drive operational controls and objectives.
ER9 Legal Register	Links the carbon-related legislation - Climate Change Act, SECR, UK ETS, PPN 06/21 for public procurement - to the management system.

Note - all the above files can be downloaded with an alphaZ subscription.

Frequently Asked Questions

What is the difference between net zero and carbon neutral?

Net zero typically requires deep emissions reduction in line with climate science, with remaining residual emissions balanced by equivalent removals. Carbon neutral is a narrower claim - offsetting current emissions to claim a net-zero balance, often without an underlying reduction pathway. Net zero is generally the more credible and more demanding claim.

Do we need a Carbon Reduction Plan to bid for public sector work?

For UK central government contracts above £5 million annual value, yes - PPN 06/21 requires bidders to publish a Carbon Reduction Plan covering Scope 1, 2 and prioritised Scope 3 emissions with a net zero commitment by 2050. Below that threshold, individual buying authorities can set their own requirements, and many do.

How do we start a carbon inventory?

Start with Scope 1 and 2 - fuel, gas, electricity - using published conversion factors (BEIS/DESNZ publish these annually for the UK). Define the boundary clearly (which sites, which operations, which emissions are included). Choose a baseline year and stick with the same methodology so subsequent years are comparable.

Is offsetting credible for net zero?

High-quality offsets or removals are accepted for genuinely residual emissions that cannot be reduced further. Offsets are not credible as the main tool for hitting a net zero target - the ASA and several regulators have taken enforcement action against misleading claims. The reduction pathway has to carry most of the work.

UK Legislation

The following UK legislation is directly relevant to carbon management and net zero. Organisations outside the UK should identify the equivalent legislation applicable in their jurisdiction.

Further Resources