What is
Glossary?

Explore key terms in carbon accounting, supporting accurate measurement and management of environmental impact.

Glossary

Activity data

Quantitative measures of consumption or production, such as litres of fuel used or kilowatt-hours of electricity consumed, which are combined with emission factors to calculate greenhouse gas emissions.

Average-data method

Calculation method for Scope 3 emissions that use sectoral or category average data. While less precise than other methods, it proves useful when supplier-specific data are unavailable.

Cap and Trade

A regulatory system for managing greenhouse gas emissions that sets a maximum limit (cap) for emissions allowed within a specific sector or region. These limits are quantified as allowances (1 tonne of COâ‚‚ equivalent = 1 allowance). Companies emitting less than their allocation can sell surplus allowances, whereas those exceeding their cap must purchase credits from organisations operating below their limit.

Carbon accounting

A framework for measuring, recording, and analysing information related to greenhouse gas emissions. It informs decision-makers within the company and external stakeholders.

Carbon allowance

Represents the right to emit one tonne of COâ‚‚ or equivalent greenhouse gases (COâ‚‚e), typically within an emissions trading system such as the ETS. Allowances can be allocated free, purchased, or sold. The system incentivises emission reductions and rewards those emitting less than their limit by allowing them to sell excess allowances to others needing additional credits.

Carbon credit

A unit representing the capture (removal or absorption) or avoidance of one tonne of COâ‚‚ equivalent. Carbon credits can be traded in markets and are often used by companies to offset their emissions.

Carbon Footprint

Represents the total greenhouse gas emissions attributed to a product, service, or organisation over a specified period. It serves as a critical measure of environmental impact and helps identify areas for reducing emissions.

Carbon management accounting

The practice of monitoring and managing an organisation’s greenhouse gas emissions. This involves measuring, tracking, and reporting emissions while implementing strategies to mitigate them. It enables businesses to identify emission sources, set reduction targets, and monitor progress, ensuring regulatory compliance and transparency.

Carbon Neutrality

The achievement of a balance between greenhouse gas emissions produced and those offset through reduction initiatives, emission capture, or removal

CDP (Carbon disclosure project)

An international non-profit organisation that promotes environmental transparency and provides a recognised system for sustainable reporting. The CDP collects and publishes self-reported greenhouse gas emission data from organisations and offers comparative metrics.

Climate change

Refers to long-term changes in climate patterns and atmospheric conditions driven by the increase of greenhouse gases in the atmosphere. These changes can result from both natural causes and, more prominently, human activities.

COâ‚‚ (Carbon Dioxide)

A colourless, odourless gas produced by the combustion of fossil fuels, biomass, and other carbon-based materials. It is a primary contributor to global warming, making its monitoring a priority in climate policies.

CO2 equivalent

A standardised metric expressing the impact of various greenhouse gases in terms of the equivalent amount of COâ‚‚. Gases like methane and nitrous oxide, which have greater warming potential, are converted into COâ‚‚ equivalents (COâ‚‚e) using their Global Warming Potential (GWP) to facilitate aggregation of total emissions.

Decarbonisation

The systematic reduction of carbon emissions into the atmosphere. For businesses, this involves adopting renewable energy, enhancing energy efficiency, or investing in low-carbon technologies.

DEFRA

The UK Department for Environment, Food & Rural Affairs, which oversees policies on the environment, food, and rural areas. DEFRA provides greenhouse gas emission factors and guidelines for organisations to calculate their emissions.

Direct emissions

Greenhouse gas emissions directly produced by sources owned or controlled by an organisation.

EFRAG

The European Financial Reporting Advisory Group is an organisation that supports the European Commission in developing sustainability and financial reporting standards, aligning companies with EU environmental and social goals.

Emission data

Quantitative information detailing the greenhouse gas emissions generated by an organisation’s activities or specific products. This data is useful for managing and reporting emissions including raw data from emission sources and calculated emission figures.

Emission factor (EF)

Represents the quantity of greenhouse gases emitted per unit of activity (e.g., kg of COâ‚‚ per kWh of electricity consumed). It is used to estimate emissions based on consumption or production data and varies depending on the type of activity and energy source.

Emission offsetting

A strategy in which companies finance projects that reduce or remove greenhouse gases to compensate for their emissions. Common initiatives include reforestation, renewable energy development, and carbon capture technologies.

Emissions Trading System (ETS)

A system based on the Cap and Trade mechanism, primarily used in Europe, to regulate corporate COâ‚‚ emissions. The ETS sets a cap on total emissions per sector and allocates or sells allowances to participating companies, which can then be traded.

Financial accounting

Refers to the process of recording greenhouse gas (GHG) emissions in economic terms, associated with market mechanisms such as Cap and Trade. This approach analyses the management and trading of carbon allowances —whether allocated, purchased, or sold— to optimise the financial performance and contribute to overall emissions reductions.

Greenhouse Gases (GHG)

Gases that trap heat in the Earth’s atmosphere, contributing to global warming and climate change. Major greenhouse gases include carbon dioxide (COâ‚‚), methane (CHâ‚„), and nitrous oxide (Nâ‚‚O).

Greenhouse gas emissions

The release of greenhouse gases into the atmosphere from human or natural activities. These include COâ‚‚, methane, nitrous oxide, and fluorinated gases, all of which contribute to global warming and climate change.

GHG Inventory

A detailed account of an organisation’s greenhouse gas emissions and removals, or those of a specific project. It is an essential tool for monitoring and reporting environmental impact and setting emission reduction targets.

GHG Protocol (Greenhouse Gas Protocol)

A voluntary international standard for measuring, managing, and reporting greenhouse gas emissions. Developed by the World Resources

Institute (WRI) and the World Business Council for Sustainable Development (WBCSD), it is widely used globally to help organisations measure and reduce their environmental impact. The protocol categorises emissions into direct and indirect sources (Scope 1, Scope 2, and Scope 3), defines quantification methods, and establishes criteria for determining organisational boundaries.

Global Warming Potential (GWP)

An index measuring a greenhouse gas’s capacity to trap heat in the atmosphere over a defined period compared to carbon dioxide (COâ‚‚). The higher the GWP of a gas, the greater its impact on global warming relative to COâ‚‚.

Greenwashing

The practice of making misleading or false claims about a company’s products or policies being environmentally friendly to enhance the public image of the company without implementing meaningful changes

Hybrid method

Method for calculating Scope 3 emissions that combines multiple methodologies (e.g., supplier-specific, average-data, and spend-based approaches) to achieve a more comprehensive estimate, adapting to the availability of data across the supply chain.

Indirect emissions

Emissions arising from activities not directly controlled by an organisation but related to the consumption of goods or services, such as purchased electricity (Scope 2) or supply chain emissions (Scope 3).

IPCC (Intergovernmental Panel on Climate Change)

A UN-established body tasked with providing scientific, technical, and socio-economic assessments on climate change. It publishes periodic scientific reports to guide global climate policies and actions.

ISO 14064

A voluntary international standard by the International Organization for Standardization (ISO) that specifies requirements for quantifying, monitoring, reporting, and verifying greenhouse gas emissions and reductions. It consists of three parts:

· ISO 14064-1: For quantification and reporting of emissions at the organisational level.

· ISO 14064-2: For quantification of emission reductions at the project level.

· ISO 14064-3: For verification and validation of emissions claims.

ISPRA

The Italian Institute for Environmental Protection and Research, responsible for environmental monitoring, research, and conservation. It provides official data and reports on greenhouse gas emissions and other environmental factors, acting as a national reference for implementing European environmental regulations.

Life Cycle Assessment (LCA)

A systematic methodology for analysing the environmental impact of a product, service, or process throughout its life cycle, from raw material extraction to production, distribution, use, and disposal. It is a crucial tool for identifying areas for sustainability improvement in business practices.

Location based method

This method calculates Scope 2 emissions using average emission factors for a given geographical area (e.g., the national energy mix). It reflects the average impact of electricity consumption in a specific location.

Market based method

This method calculates Scope 2 emissions based on emission factors specific to the energy suppliers chosen by the organisation. It allows for greater precision by considering the source of purchased energy through contracts or energy certifications.

PAS 2050

Developed by the British Standards Institution (BSI), this standard provides a methodology for calculating and reporting greenhouse gas emissions across the life cycle of a

product or service. It considers all supply chain stages, from raw material extraction to disposal, enabling companies to measure and reduce the carbon footprint of their products.

Reforestation

The process of restoring forests in previously deforested areas, aiming to improve biodiversity, sequester COâ‚‚ from the atmosphere, restore natural habitats, and counteract environmental degradation.

Science Based Target Initiative (SBTi)

A global initiative providing guidelines and certifications for companies aiming to set emission reduction targets aligned with the latest scientific evidence and the Paris Agreement. It advocates emission reductions sufficient to limit global warming to below 1.5°.

Scope 1

Defined by the GHG Protocol, Scope 1 includes direct greenhouse gas emissions from sources owned or controlled by an organisation, such as fuel combustion in industrial facilities, company vehicles, and other direct activities.

Scope 2

Defined by the GHG Protocol, Scope 2 covers indirect emissions from the energy purchased by an organisation, such as electricity, heat, and steam. These emissions are produced externally but result from the organisation’s energy consumption.

Scope 3

Defined by the GHG Protocol, Scope 3 encompasses all other indirect emissions outside Scope 1 and Scope 2, arising along the organisation’s value chain. These include emissions from the production of purchased goods and services, employee travel, transportation and distribution, waste, and product usage.

Spend-based method

Estimates Scope 3 emissions by using the economic value of purchases. Emissions are calculated by multiplying the amount spent in a specific category by an economic emission factor (e.g., COâ‚‚ per euro spent), providing a preliminary estimate when specific data are unavailable.

Supplier specific method

A method for calculating Scope 3 emissions based on emission data provided directly by an organisation’s suppliers. It offers greater accuracy by using real emissions data associated with purchased products.

Sustainability function

Within an organisation, it refers to the unit, department, or team responsible for sustainability strategies. Its functions include developing policies focused on sustainability and social responsibility, managing emissions, reducing environmental impact, and ensuring compliance with environmental regulation.

Average-data method

Metodo di calcolo delle emissioni di Scope 3 basato sull’utilizzo di dati medi settoriali o di categoria. Pur meno preciso di altri metodi, dimostra la sua utilità in assenza di dati specifici del fornitore.

Climate change

Long-term changes that occur on climate models and atmospheric variables as a consequence of the increase in greenhouse gases present in the atmosphere. These changes can be attributable to both natural factors and, mainly, human activities.

Cap and Trade

Emissions regulatory system that establishes a maximum limit (cap) on greenhouse gas emissions allowed in a specific sector or territory. At company level, the maximum limit is expressed in number of emission quotas (1 ton of CO2eq. = 1 quota), companies that emit less than their limit can sell their excess quotas, while those that exceed the limit must buy (trade) emission allowances (credits) from those below.

Carbon accounting

System that uses accounting methods and procedures to collect, record and analyze information relating to climate change in order to inform the decision-making processes of internal managers and stakeholders external to the company.

Carbon Footprint:

Indice di valutazione dell’impatto ambientale e consente di identificare le aree su cui agire per ridurre le emissioni. Misura il totale di gas serra emessi da un prodotto, un servizio o un’organizzazione in un periodo di tempo definito.

Carbon management accounting

Objective which consists in the complete balancing between the emissions produced (by an activity, product or organisation) and those compensated through actions to reduce greenhouse gases, capture (prior to the emission of gas in the atmosphere) or removal (after emission has already occurred).

Carbon Neutrality

Obiettivo che consiste nel completo bilanciamento tra le emissioni prodotte (da un’attività, prodotto o organizzazione) e quelle compensate attraverso azioni di riduzione dei gas serra, cattura (antecedente all’emissione di gas in atmosfera) o rimozione (ad emissione già avvenuta).

CDP (Carbon disclosure project)

International non-profit organization that promotes environmental transparency and offers a recognized system of sustainable reporting. The CDP collects and disseminates self-reported greenhouse gas emissions data from organizations and produces comparative metrics.

CO2 equivalent

Standardized measure that expresses the impact of different greenhouse gases in terms of equivalent quantity of COâ‚‚. Some gases (e.g. methane or nitrous oxide) have a higher warming effect than COâ‚‚ and must therefore be converted into COâ‚‚e using their Global Warming Potential (GWP), allowing companies to add up total emissions.

Emissions compensation
Strategy through which companies finance projects to reduce, capture or remove greenhouse gases to balance their emissions. Among the most common projects are reforestation, renewable energy and carbon capture technologies.
Carbon credit
Reference unit that certifies the capture (carbon removal or absorption) or limitation (non-emission, carbon avoidance) of one ton of CO2 equivalent. Carbon credits can be bought and sold under the Emission Trading System (ETS) and are often used by companies to offset their emissions.
Activity data
Specific measurement of consumption or production (e.g. liters of fuel used or kWh of electricity consumed) used to calculate GHG emissions. This data, combined with emission factors, allows emissions to be quantified.
Decarbonization
Gradual and systematic reduction of carbon emissions present in the atmosphere.
DEFRA (Department for Environment, Food and Rural Affairs)
UK government department dealing with environmental, food and rural policies. Among its tasks, DEFRA publishes and updates emission factors and guidelines for calculating greenhouse gas emissions for organisations.
EFRAG (European Financial Reporting Advisory Group)
Professional body that supports the European Commission in the development of standards for financial reporting (IFRS) and sustainability (ESRS), supports companies in complying with the EU’s environmental and social objectives.
Issue date
Quantitative information on greenhouse gas emissions produced by an organization’s activities or a specific product. They are key to emissions management and reporting and include raw data on emission sources and actual emissions calculations.
Direct emission

Emissioni di gas serra prodotte da fonti possedute o controllate direttamente da un’organizzazione.

Greenhouse gas emissions
Release of greenhouse gases into the atmosphere due to human or natural activities. Greenhouse gas emissions include COâ‚‚, methane, nitrous oxide and fluorinated gases, all of which contribute to global warming and climate change.
Indirect emission
Greenhouse gas emissions that derive from activities not directly controlled by the organization, but linked to the consumption of goods and services, such as purchased electricity (Scope 2) or emissions along the supply chain (Scope 3).
Emissions Trading System (ETS)
System based on the Cap and Trade mechanism, used mainly in Europe, to regulate companies’ COâ‚‚ emissions. The ETS sets a cap on total emissions by sector and distributes or sells allowances to participating companies, which can then be traded.
Emission factor (EF)
Quantity of greenhouse gases emitted per unit of activity (e.g. kg of COâ‚‚ per kWh of electricity consumed). It is used to estimate emissions based on consumption or production data and varies based on the type of activity and energy source.
Financial carbon accounting
Process of accounting for greenhouse gas (GHG) emissions in economic terms, linked to market systems such as Cap-and-Trade. This approach analyzes the management and compensation mechanisms of carbon quotas received, purchased or sold on the market, in order to optimize costs and contribute to the overall reduction of emissions.
Greenhouse Gases (GHG, gas a effetto serra)
Molecules that, by retaining heat in the Earth’s atmosphere, contribute to global warming and climate change. The main greenhouse gases include carbon dioxide (COâ‚‚), methane (CHâ‚„), nitrous oxide (Nâ‚‚O), hydrofluorocarbons (HFC), perfluorocarbons (PFC), sulfur hexafluoride (SF6).
GHG Protocol (Greenhouse Gas Protocol)
Voluntary international standard for the measurement, management and reporting of greenhouse gas emissions. Created by the World Resources Institute (WRI) and the World Business Council for Sustainable Development (WBCSD), the GHG Protocol is one of the most widely used standards globally to help organizations measure and reduce their environmental impact. The protocol classifies the direct and indirect emissions produced by the organization (Scope 1, Scope 2 and Scope 3), announces the quantification methods and provides the criteria for defining corporate boundaries.
Global Warming Potential (GWP)
Index that measures the ability of a greenhouse gas to retain heat in the atmosphere over a defined period, compared to that of carbon dioxide (COâ‚‚). The higher the GWP of a gas, the greater its impact on global warming compared to COâ‚‚.
Greenwashing
Deceptive practice through which organizations promote fictitious environmental or sustainability initiatives, without support from real actions, with the aim of improving their public image without making concrete changes to their work.
Hybrid method
Method that calculates Scope 3 emissions by combining different methodologies (such as supplier-specific, average-data and spend-based) to arrive at emissions more comprehensively, adapting to different data availability along the supply chain.
Inventario GHG
Detailed reporting of greenhouse gas emissions and removals of an organization or, possibly, a project. The inventory is an essential tool for monitoring and reporting environmental impact and for setting emission reduction objectives.
IPCC (Intergovernmental Panel on Climate Change)
Intergovernmental Panel on Climate Change created by the United Nations, with the task of providing scientific, technical and socioeconomic assessments on climate change. Scientific reports are published periodically to guide global climate policies and actions.
ISO 14064
ISO (International Organization for Standardization) international standard which specifies the requirements for the quantification, monitoring, reporting and verification of
ISPRA (Higher Institute for Environmental Protection and Research)
Italian organization that deals with environmental monitoring, research and environmental protection. It provides official data and reports on greenhouse gas emissions and other environmental aspects, also acting as a national reference for the application of European environmental regulations.
Life Cycle Assessment (LCA)
Systematic methodology that analyzes the environmental impact of a product, service or process throughout its life cycle: from the extraction of raw materials to production, distribution, use and disposal. For business purposes it represents an essential tool for identifying areas of improvement in terms of sustainability.
Location based
Scope 2 emissions calculation method that uses the average emission factors of a specific geographical area (for example, the national energy mix). It therefore reflects the average impact of the electricity consumed in a given location.
Market based
Scope 2 emissions calculation method that is based on the specific emission factors of the energy suppliers chosen by the organization. It makes greater precision possible by considering the origin of the energy sources that can be purchased through contracts or energy certifications.
PAS 2050

Standard, sviluppato dalla British Standards Institution (BSI), per calcolare e rendicontare le emissioni di gas a effetto serra lungo il ciclo di vita di un prodotto o servizio. Fornisce una metodologia per quantificare l’impatto climatico dei prodotti considerando tutte le fasi della catena di fornitura, dall’estrazione delle materie prime allo smaltimento, permettendo alle aziende di misurare e ridurre l’impronta di carbonio dei loro prodotti.

Emission quota (carbon allowance)
Right to emit one tonne of COâ‚‚ or another equivalent greenhouse gas (Co2e), usually within an emissions trading scheme such as the ETS. Shares can be distributed free of charge, bought or sold. The mechanism encourages the reduction of emissions and benefits those who emit less than their limit, allowing them to resell their quotas to those who need further credits.
Reforestation
Process of restoring forests in previously deforested areas, with the aim of improving biodiversity, sequestering COâ‚‚ from the atmosphere, restoring natural habitats and counteracting environmental degradation.Scope 1: Type of emissions, foreseen by the GHG protocol, which includes direct emissions of greenhouse gases that come from sources owned or controlled by the organization , such as the combustion of fuels in industrial plants, company vehicles and other direct combustion activities.Scope 2: Type of emissions, foreseen by the GHG protocol, which includes indirect emissions linked to the energy purchased by the organization, mainly electricity, heat and steam.These emissions are not generated directly by the organization, but are the result of the production of the energy used.Scope 3: Type of emissions, foreseen by the GHG protocol, which covers all indirect emissions that do not fall within Scope 2, originating along the value of the organization. This includes emissions from the production of purchased goods and services, employee travel, transportation and distribution, waste and the use of sold products.
Science Based Target Initiative (SBTi)
Global initiative that provides guidelines and certifications for companies that want to set emissions reduction targets in line with the latest scientific evidence and the Paris Agreement. Promote emissions reductions sufficient to keep global warming below 1.5°C compared to pre-industrial levels.
Spend-based method
Scope 3 emissions estimation method that uses the economic value of purchases. Emissions are calculated by multiplying the amount spent in a given category by an economic emission factor (e.g. COâ‚‚ per euro), providing a preliminary estimate in the absence of specific data.
Supplier specific method
Scope 3 emissions estimation method that is based on emissions data provided directly by the organization’s suppliers. It guarantees greater precision as it uses real data on the emissions associated with the products purchased.