How GHG Accounting Supports Your Decarbonisation Journey

As climate action becomes a global priority, organisations are increasingly expected to monitor and reduce their greenhouse gas (GHG) emissions, an urgency  driven by evolving regulatory requirements, customer expectations, investor demands, or corporate climate commitments. Consequently, decarbonisation is no longer solely an environmental initiative, but an essential part of long-term business resilience and competitiveness.

Whether organisations are just beginning their decarbonisation journey or looking to strengthen existing climate initiatives, many questions often arise: Where should we start? How do we calculate it? What data should we use? 

We can start by  understanding what greenhouse gas emissions are.

Understanding Scope 1, Scope 2, and Scope 3 Emissions

Before organisations can reduce emissions, they first need to understand where those emissions originate. This process, known as GHG accounting, establishes a reliable emissions baseline that supports informed decision-making and helps organizations monitor progress over time.

According to GHG Protocol, greenhouse gas emissions are generally classified into three categories:

• Scope 1 covers direct emissions from sources owned or controlled by the organisation, such as fuel combustion in company facilities.

• Scope 2 includes indirect emissions from purchased electricity, steam, heating, or cooling.

• Scope 3 encompasses all other indirect emissions generated throughout the value chain, including purchased goods and services, transportation, business travel, waste, and product use.

Why Start with GHG Accounting?

Decarbonisation is not simply about reducing emissions. It is about understanding where reductions will have the greatest impact. Without reliable emissions data, organisations may struggle to identify which activities contribute the most to their carbon footprint or determine where reduction efforts should be prioritized.

By measuring greenhouse gas emissions across Scope 1, Scope 2, and Scope 3, businesses can identify emission hotspots, prioritize reduction initiatives, set realistic targets, and monitor progress over time. A comprehensive GHG inventory also supports sustainability reporting and helps organizations prepare for evolving climate-related disclosure requirements. 

For many organisations, Scope 3 accounts for the largest share of total emissions. Measuring emissions across all three scopes provides a more complete picture of an organisation's carbon footprint, helping identify where decarbonisation efforts can deliver the greatest impact. By establishing this clear and reliable emissions baseline, organisations can make more informed decisions and focus their resources on initiatives that create meaningful environmental and business value.  

Conclusion

Decarbonisation is not achieved through a single initiative but through a series of informed decisions backed by reliable data. Measuring greenhouse gas emissions across Scope 1, Scope 2, and Scope 3 provides organisations with the foundation to identify opportunities, develop practical reduction strategies, and measure progress toward their climate goals.

As expectations for climate action continue to evolve, establishing a credible emissions baseline is becoming an increasingly important step toward strengthening sustainability performance and creating long-term business value.

Can LCI Support GHG Accounting Calculation? 

Whether you're just getting started or advancing your decarbonisation efforts, we're here to help your organisation.

We support organisations to achieve impactful decarbonisation through our extensive experience in delivering data-driven projects. By utilising Scope 1/2/3 GHG accounting and Life Cycle Assessment (LCA), we help businesses precisely measure emissions, establish sustainability targets and roadmaps, and implement continuous monitoring to identify key opportunities for improvement. 

Backed by our proven track record of over 500 LCA projects that include calculation of Product Carbon Footprint (PCF) and climate risk study across diverse industries, we build practical decarbonisation strategies that successfully turn complex environmental data into meaningful and measurable climate action.

References

1. Greenhouse Gas Protocol. (n.d.). Corporate Standard. https://ghgprotocol.org/corporate-standard

2. Greenhouse Gas Protocol. (n.d.). Corporate Value Chain (Scope 3) Standard. https://ghgprotocol.org/standards/scope-3-standard