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Carbon Accounting

Demystifying Scope 3 Emissions in Industrial Operations

June 1, 20264 min readBy AtmoGrade Advisors

A practical guide to mapping upstream and downstream value chain emissions under the GHG Protocol.

As industrial organizations commit to Net Zero goals, measuring direct operational impact is no longer sufficient. Up to 80% of an enterprise's total carbon footprint lies in Scope 3 emissions—indirect activities occurring in its upstream and downstream value chain.

What are Scope 3 Emissions?

Under the Greenhouse Gas (GHG) Protocol, emissions are classified into three scopes:

  • Scope 1: Direct emissions from owned or controlled sources (e.g., fuel combustion, company vehicles).
  • Scope 2: Indirect emissions from the generation of purchased electricity, steam, heating, and cooling.
  • Scope 3: All other indirect emissions that occur in the company’s value chain, divided into 15 categories (e.g., purchased goods, business travel, product disposal).

Keys to Mapping Your Value Chain

Mapping Scope 3 emissions requires a structured approach to data collection:

  • Screen for Relevance: Identify which of the 15 categories are material to your business operations. For manufacturers, Category 1 (Purchased Goods & Services) and Category 11 (Use of Sold Products) are usually dominant.
  • Engage Suppliers: Shift from industry-average emissions factors to primary data collected directly from key supply partners.
  • Establish Data Baselines: Build a centralized data pipeline to track logistics distances, raw material weights, and energy usage profiles.

Building Audit-Ready Disclosures

In India, the Securities and Exchange Board of India (SEBI) has steadily increased transparency requirements. Large enterprises must now report on their supply chain footprint. To ensure these disclosures stand up to investor and regulatory scrutiny, companies are increasingly pairing their reporting with a third-party ISO 14064 GHG Audit to verify their inventory assertions.

By mapping and reducing value-chain footprints, industrial enterprises can mitigate regulatory risks, satisfy stakeholder expectations, and discover cost-saving opportunities across their logistics and procurement networks.