- Scope 3 emissions, generated across supply chains, account for the majority of corporate carbon footprints and have become a major CSR and sustainability challenge in 2026.
- New regulations such as the EU’s CSRD and California’s SB 253 are forcing companies to disclose and verify supply chain emissions, increasing accountability and reducing greenwashing.
- Businesses are now expected to take responsibility for emissions throughout their value chains, making transparent reporting and supplier engagement essential for long-term sustainability.
For years, corporations have measured their environmental footprint by what happens inside their four walls, the electricity they consume, the fuel their trucks burn, the emissions their factories produce. Clean up the factory floor, switch to renewable energy for the head office, and the sustainability report writes itself. The problem? That number, tidy as it looks, accounts for as little as 10% of what a company’s operations actually release into the atmosphere.
The remaining 90% lives somewhere far less convenient: in the supply chain.
This is the uncomfortable truth now sitting at the centre of corporate social responsibility in 2026. Scope 3 emissions, the indirect greenhouse gas emissions generated across a company’s entire value chain, from raw material suppliers to the moment a customer disposes of a product, have graduated from a footnote in annual reports to a legal obligation, a reputational risk, and the defining CSR challenge of the decade.
The Numbers Don’t Lie, But Many Reports Do
According to EcoVadis, Scope 3 supply chain emissions are on average 26 times greater than a company’s direct operational emissions. However, only 38% of companies are currently tracking these metrics. Among those that do, most depend on spend-based estimates, which are so imprecise that two companies within the same industry, using the same suppliers, can report significantly different carbon footprints based solely on their calculation methods.
In 2026, a study published in npj Climate Action found that 96% of examined cases showed signs of greenwashing risk, with many struggling with Scope 3 issues. According to MIT’s Sustainable Supply Chain Lab, Scope 3 emissions account for more than 75% of corporate carbon footprints. This is based on the data from 1,200 experts in over 93 countries. Yet translating that knowledge into daily operational decisions remains a struggle for most companies.
The gap between what companies promise and what they actually do has not gone unnoticed by regulators.
Regulation Is No Longer Optional
The European Union’s Corporate Sustainability Reporting Directive (CSRD) is already in force for large EU companies. It mandates comprehensive Scope 3 disclosure, third-party verification, and a Paris Agreement-aligned transition plan. It will eventually cover over 50,000 companies globally. Germany’s Supply Chain Act holds companies legally accountable for human rights and environmental violations in their supplier networks. The EU’s Carbon Border Adjustment Mechanism, which entered full operational mode in January 2026, means importers can only comply if their overseas suppliers provide verified emissions data or face carbon costs at the point of entry.
California, not to be outdone, passed SB 253, requiring Scope 3 reporting from any company with over $1 billion in annual revenue operating in the state, with reporting commencing in 2027.
The message from legislators is clear: what happens in your supply chain is no longer your suppliers’ problem to manage quietly. It is yours to disclose publicly and defend legally.
Consequences of Greenwashing?
Just look at Shein. In early 2026, an Italian court fined the fast-fashion giant €1 million for false eco-friendly claims on its site. They were called out for their vague greenhouse gas targets, which they said were contradictory to a spike in emissions over the past two years. This wasn’t unique. Across the UK, Australia, and the EU, regulators spent 2025 aggressively pursuing companies whose environmental marketing outpaced their environmental reality.
Sixty percent of sustainability experts, per a Fidelity survey, do not believe corporations’ climate commitments are backed by proportionate action. Less than 1% of companies disclosing through CDP have what the organisation considers a credible transition plan.
How Accountability Should Actually Look Like
Here’s the uncomfortable gap nobody in a boardroom wants to say out loud: most companies can tell you their Scope 3 number. Far fewer can tell you what they’re actually doing about it.
Leading companies do not treat their suppliers as mere sources of data for carbon figures; many top businesses embed sustainability criteria directly into their procurement contracts, co-finance supplier transitions, etc.
Companies are expected to show real progress across their entire supply chains, not just their own departments. The days of glossy CSR reports packed with vague promises are winding down. Regulators, investors, and now even customers aren’t buying empty gestures anymore.
In 2026, your supply chain’s emissions are your emissions. The sooner businesses internalise that, the better positioned they will be, legally, competitively, and morally.
Clear Cut Climate Desk
New Delhi, UPDATED: June 08, 2026 09:00 IST
Written By: Asmita Yadav
