The carbon footprint is a tool that allows the measurement, calculation, and management of greenhouse gas (GHG) emissions associated with an activity, product, service, or organization. Its verification ensures the accuracy and credibility of emissions reports, demonstrating corporate commitment to mitigating the effects of climate change.
The carbon footprint quantifies the total amount ofgreenhouse gases (GHG)emitted directly or indirectly by an activity, product, service, or organization. It is expressed intons of CO₂ equivalent, a unit that allows gases with different global warming potentials to be compared. Its purpose is to provide an objective measurement of the climate impact generated by a process or activity, making it a key indicator for corporate sustainability.
It has become anessential indicator forany organization that aspires to measure and reduce its environmental impact. In a context where sustainability, transparency, and ESG performance are becoming increasingly important in decision-making, knowing your carbon footprint is an essential step in demonstratingyour commitment to the fight against climate change.
Which greenhouse gases are taken into account in the carbon footprint?
The carbon footprint calculation considers the main internationally recognized greenhouse gases . These include:
- Carbon dioxide (CO₂)
- Methane (CH₄)
- Nitrous oxide (N₂O)
- Hydrofluorocarbons (HFCs)
- Perfluorocarbons (PFCs)
- Sulfur hexafluoride (SF₆)
These gases have different levels of climate impact, but they all contribute to global warming. Measuring them together provides a complete picture of the emissions associated with a production process, a corporate operation, or a specific event. The carbon footprint thus becomes a benchmark environmental indicator for assessing the sustainability of an activity and its contribution to climate change.
How to calculate your carbon footprint: basic steps
To calculate its carbon footprint, a company must collect activity data (energy, fuel, transportation, processes, etc.), apply emission factors, and convert the result into tons of CO₂ equivalent.
The general process includes:
- Define the scope(organization, product, event).
- Identifydirect and indirect emission sources.
- Collect activity data(consumption, movements, processes, etc.).
- Apply official emission factors.
- Calculate total emissions (t CO₂e).
- Verify inventoryto ensure data reliability.
Scope 1, Scope 2, and Scope 3: what each one means
Before calculating the carbon footprint, it is essential to define the scope of emissions according to the criteria established by the GHG Protocol, the international benchmark standard. This classification into Scope 1, Scope 2, and Scope 3 allows for the consistent structuring of the GHG inventory, the correct identification of emission sources, and the comparability of results between organizations.
- Scope 1: direct emissions from the company (combustion, boilers, company vehicles).
- Scope 2: indirect emissions associated with the consumption of purchased electricity or heat.
- Scope 3: other indirect emissions (suppliers, logistics, travel, waste, products, etc.).
Areas for calculating carbon footprint
Carbon footprintcalculations can be applied at different levels, depending on the organization's objective and the scope it wishes to measure. There are three main areas:
ACERTA describes three main areas:
1. Organizational Carbon Footprint
It includes all of a company's activities and processes over a given period. It is the most commonly used scope by organizations that want to assess their overall impact and demonstrate their commitment to climate action. Analyzing an organization's carbon footprint allows it to identify areas for cross-cutting improvement, optimize processes, and move toward annual emissions reduction policies.
2. Carbon Footprint of Product or Service
It assesses the emissions of a product or service throughout its life cycle: from the extraction of raw materials to the management of waste once it has reached the end of its useful life. This approach is particularly relevant in industrial, agri-food, and manufacturing sectors that seek to demonstrate the environmental performance of their products throughout the entire chain.
3. Event Carbon Footprint
Analyzes the emissions generated by the organization and development of a specific event, including transportation, energy, materials, logistics, and audience travel. This area is common in trade shows, conferences, institutional events, and cultural activities that seek to communicate their impact and offset it.
A verified carbon footprint avoids common calculation errors and ensures that the reported data complies with recognized standards such as ISO 14064 or the GHG Protocol.
Tools for calculating your carbon footprint
There are official tools such as the one provided by the Ministry for Ecological Transition (MITECO) and other international calculators that allow you to estimate your carbon footprint.
These tools help to obtain an initial calculation, although for corporate reports it is essential to apply recognized methodologies (GHG Protocol, ISO 14064) and, in many cases, to have external verification.
Why calculate your carbon footprint?
Calculating their carbon footprint enables organizations to:
- Know precisely your climate impact.
- Identify main sources of emissions.
- Make data-driven decisions to improve processes.
- Move towards reduction and decarbonization strategies.
- Comply with regulatory, sector-specific, or customer requirements.
- Send a clear message of environmental commitment.
The carbon footprint is not just a technical indicator. It is also a strategic tool for corporate sustainability, especially in markets where environmental responsibility and information transparency are valued.
Calculating your carbon footprint is the first step toward reducing it, setting decarbonization goals, and complying with increasingly stringent environmental regulations.
How to reduce your carbon footprint once it has been calculated
Calculating your carbon footprint is only the first step. Once the main sources of emissions have been identified, organizations can design effective strategies to reduce their climate impact. Although specific measures depend on the sector and type of activity, there are common lines of action that enable progress toward decarbonization.
1. Energy optimization: replacingold equipment with efficient technologies and adjusting consumption directly reduces energy use and associated emissions.
2. Integration of renewable energies: theinstallation of systems such as photovoltaic or aerothermal energy reduces dependence on fossil fuels and structurally reduces the carbon footprint.
3. Sustainable mobility: promotingpublic transport, electric vehicles, and active travel reduces emissions from transportation, one of the main sources of GHG emissions.
4. Efficient waste management: implementingreduction, reuse, and recycling strategies reduces emissions from waste treatment and improves overall environmental performance.
5. Process and operations optimization: reviewinginternal processes to minimize consumption, leaks, or inefficiencies reduces emissions throughout the production chain.
6. Responsible sourcing: selectingsuppliers based on environmental criteria and low-impact products reduces indirect emissions associated with the life cycle (Scope 3).
7. Digitization and automation: theuse of digital tools allows consumption to be monitored, efficiency opportunities to be identified, and high-energy-cost on-site activities to be reduced.
8. Team training and awareness: promotinga corporate culture focused on sustainability encourages the adoption of low-impact practices in all areas of the organization.
Why it is important to verify your carbon footprint
Carbon footprint verificationis an independent process designed to ensure that an organization's emissions report is rigorous, consistent, and technically reliable. Through professional verification, an external entity reviews the methodology used, the data collected, the emission factors applied, and the traceability of the inventory.
Verifying your carbon footprint has multiple benefits:
- Accuracy and reliability: ensures that the calculation is correct and based on verifiable data.
- Corporate credibility: strengthens the trust of customers, suppliers, investors, and public bodies.
- Environmental transparency: enables results to be communicated with confidence and technical backing.
- Preparation for future regulatory requirementsin relation to climate change.
- Access to calls for tenders or contractsthat require verified environmental evidence.
Verification thus becomes a key element for any organization that wants to ensure the quality of its environmental information and advance its sustainability strategy.