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Carbon management comes with its own vocabulary. The terms below are the ones you will encounter most often when working with the NCZ Portal, reading your carbon footprint report, or progressing through the certification programme. Each definition is written in plain language so you can focus on the work rather than the jargon.

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Emissions and measurement

A carbon footprint is the total amount of greenhouse gas (GHG) emissions caused directly or indirectly by an individual, organisation, event, or product. It is usually expressed in tonnes of CO2 equivalent (tCO2e) so that different greenhouse gases can be compared on a common scale.In the NCZ Portal, your carbon footprint covers all three emission scopes — direct operations, purchased energy, and value-chain activity — giving you a complete picture of your environmental impact.
tCO2e is the standard unit for measuring greenhouse gas emissions. Because different gases (carbon dioxide, methane, nitrous oxide, and others) trap different amounts of heat, tCO2e converts them all into the equivalent warming effect of one tonne of carbon dioxide.For example, methane has roughly 28 times the warming impact of CO2 over 100 years, so 1 tonne of methane is reported as approximately 28 tCO2e. Your NCZ carbon footprint report expresses all emissions in tCO2e so figures can be compared meaningfully year-on-year.
Scope 1 covers greenhouse gas emissions that come directly from sources your organisation owns or controls. Examples include:
  • Fuel burned in company-owned vehicles
  • Natural gas used to heat your premises
  • Fugitive emissions from refrigerants in air conditioning units
  • On-site combustion processes
Scope 1 emissions are the starting point for any carbon footprint and are typically the most straightforward to measure.
Scope 2 covers indirect emissions from the generation of purchased energy — primarily electricity, but also purchased heat, steam, or cooling. Although the emissions occur at the power station rather than at your premises, your organisation is responsible for them because it drives the demand.Reducing Scope 2 emissions typically involves switching to renewable energy tariffs, installing on-site generation, or improving energy efficiency.
Scope 3 covers all other indirect emissions that occur across your value chain, both upstream and downstream. This is usually the largest and most complex category. It includes:
  • Business travel and employee commuting
  • Purchased goods and services (supply chain)
  • Waste generated in operations
  • Use of sold products
  • Capital goods and investments
The NCZ certification programme measures Scope 3 from Silver level onwards, and full supply-chain Scope 3 reporting is required for Platinum certification.
A baseline carbon footprint is the first complete measurement of your emissions for a defined reporting period, usually 12 months. It sets the starting point against which all future reductions are measured.Once NCZ has calculated your baseline, you can track year-on-year progress in the portal and demonstrate a credible reduction trend to customers, investors, and regulators.
An emission factor is a coefficient that converts a unit of activity (for example, kilowatt-hours of electricity consumed, litres of fuel burned, or kilometres travelled) into a quantity of greenhouse gas emissions in tCO2e.Emission factors are published by governments and standards bodies and are updated regularly. NCZ uses current, recognised emission factors within its calculation methodology to ensure your footprint report is accurate and defensible.
Supply chain emissions (also called value-chain emissions) are the Scope 3 emissions generated by the organisations in your supply chain — the businesses that provide the goods and services you purchase, and the customers who use what you sell.For many businesses, supply chain emissions represent the majority of their total carbon footprint. The NCZ Platinum certification level includes a structured supply-chain data collection programme to help you engage suppliers and capture this data accurately.

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Standards and verification

The Greenhouse Gas Protocol (GHG Protocol) is the most widely used international accounting standard for measuring and managing greenhouse gas emissions. It defines how to categorise emissions into Scopes 1, 2, and 3 and sets the rules for what to include in a corporate carbon footprint.NCZ follows GHG Protocol methodology in all its carbon footprint assessments, ensuring your report is consistent with global best practice and recognised by international standards bodies.
ISO 14064 is an international standard that specifies principles and requirements for measuring, quantifying, and reporting greenhouse gas emissions at the organisational level. NCZ Gold and Platinum certification requires your footprint to be reported in compliance with ISO 14064.Achieving ISO 14064 compliance demonstrates that your emissions data has been collected and calculated according to a rigorous, internationally recognised methodology.
These are the three leading international certification schemes for carbon offsetting projects:
  • Gold Standard — projects certified by the Gold Standard Foundation, recognised for high environmental and social impact
  • Verified Carbon Standard (VCS) — also known as Verra, the world’s most widely used voluntary carbon crediting programme
  • UN CDM (Clean Development Mechanism) — a United Nations Framework Convention on Climate Change mechanism that allows certified emission reductions from projects in developing countries
NCZ sources carbon credits exclusively from projects certified under one of these three schemes, providing verifiable, credible offsetting for any unavoidable emissions.
Independent verification means that your carbon footprint data and calculations are reviewed and confirmed by a qualified third party who has no financial interest in the outcome. This gives your report credibility with customers, investors, and regulators.NCZ provides independent third-party verification as part of its Gold and Platinum certification levels, confirming that internationally recognised calculation standards have been met and best practice processes followed.
In the NCZ context, certification is the formal recognition awarded at each stage of the NCZ award and certification programme. NCZ offers four levels:
  • Blue — signed up and completed the initial carbon questionnaire
  • Silver — self-certified Scope 1, 2, and 3 report based on the NCZ benchmark framework
  • Gold — fully measured and ISO 14064 compliant footprint with independent verification
  • Platinum — Gold criteria met, plus a supply-chain compliance programme and year-on-year emission reductions
At each level you receive a certificate and a media pack to share your achievements with clients, customers, and partners.

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Strategies and approaches

These two terms are often used interchangeably but have distinct meanings:
  • Carbon neutrality means balancing the carbon emissions you produce with an equivalent amount of verified carbon offsetting, so your net contribution to the atmosphere is zero.
  • Net Zero is a broader commitment to reduce absolute emissions as close to zero as possible across all greenhouse gases, with only a small residual amount offset using high-quality carbon credits.
NCZ supports both goals. Its carbon reduction strategy services help you reduce emissions at source, while its carbon credits programme provides a credible mechanism for balancing any remaining unavoidable emissions.
A carbon reduction strategy is a structured plan that sets targets for reducing your greenhouse gas emissions over time and identifies the specific measures you will take to achieve them. A credible strategy is:
  • Based on an accurate, verified baseline footprint
  • Aligned with recognised frameworks such as the Science Based Targets initiative (SBTi)
  • Tracked year-on-year against measurable milestones
NCZ’s certification programme is designed to guide you through building and executing a carbon reduction strategy, with your portal tracking progress at every stage.
A carbon credit represents the verified removal or avoidance of one tonne of CO2 equivalent from the atmosphere. Purchasing carbon credits allows you to balance emissions that you cannot yet eliminate — for example, while longer-term reduction measures are implemented.NCZ provides access to credits from hundreds of certified projects worldwide, all verified under Gold Standard, VCS, or UN CDM schemes. Credits are used as part of a broader carbon management strategy, not as a substitute for genuine emission reductions.
A Lifecycle Assessment (LCA) measures the total environmental impact of a product or service across its entire life — from raw material extraction and manufacturing through to use, disposal, and recycling. It is used to identify where the highest-impact emissions occur so they can be prioritised for reduction.NCZ uses LCA methodology for its carbon measured services programme, enabling service providers to calculate and report the exact emissions associated with delivering their service (for example, kg CO2e per hour of cleaning, per unit of maintenance, or per £ spent).
A carbon measured service is a contracted service — such as cleaning, security, or maintenance — that has been measured using a Lifecycle Assessment to produce a transparent emissions metric. This allows the service provider to report emissions on a client-by-client basis and demonstrate its environmental impact in concrete terms.Customers who are working towards their own carbon targets can use this data to account for their Scope 3 supply-chain emissions more accurately.
A carbon conscious event is an event whose associated greenhouse gas emissions have been measured and reported, with the option to balance them through certified carbon credits. Emissions measured include venue energy use, food and beverage, contractor activity, and delegate travel.NCZ’s events programme covers everything from small office events to large international conferences, producing an ISO 14064 compliant report and an NCZ certification for the event organiser.
If you come across a term in the NCZ Portal that is not listed here, contact your Customer Success Team or reach out via neutralcarbonzone.com/contact-us.