Sustainable supply chains: The missing link in the climate transition

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Sustainable supply chains: The missing link in the climate transition

Investment Insights • Sustainability

7 min read

Sustainable supply chains: The missing link in the climate transition

As the world races toward net-zero emissions, one powerful lever remains underused: the global supply chain. While headlines focus on solar panels and electric vehicles, the greatest climate force may lie in the background - embedded in the goods we source, move, and use every day. For many companies, emissions don’t come primarily from their operations, but from their value chain. That means the future of climate action could depend less on what happens inside company walls and more on what happens far beyond them.

Why Scope 3 matters
Scope 3 emissions include all indirect emissions that occur across a company’s value chain — both upstream and downstream. They offer a more complete picture of a company’s climate impact by capturing sources such as purchased goods, business travel, and the use of sold products. For many companies, Scope 3 emissions represent over 90% of their total carbon footprint¹, making them the largest part of most corporate carbon footprints. This broader perspective is reshaping how companies define their climate responsibility and what constitutes meaningful climate action.

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Source: WEF (2021): WEF Net Zero Challenge. The Supply Chain Opportunity.

Upstream supply chain emissions - those from purchased goods and services, capital goods, and upstream transportation - are among the most material Scope 3 categories. These can be up to 26 times greater than a company’s direct emissions (Scopes 1 and 2 combined).¹

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Source: CDP and Capgemini (2023): From stroll to sprint (left) and BCG (2021): Supply Chains as a Game-Changer in the Fight Against Climate Change (right)

This makes supply chains a major opportunity for emissions reduction. Encouragingly, up to 45% of these emissions can be addressed today with affordable, readily available solutions like renewable energy sourcing, material substitution, and logistics optimization.² Full decarbonization may increase end-product prices by just 1–4%², showing the transition is not only urgent, but economically viable.

Beyond carbon
A successful climate transition depends not only on clean energy, but also on resilient and ethical supply chains. As climate change accelerates, supply networks are increasingly exposed to both environmental and social risks. Extreme weather has disrupted factories and transport routes. Meanwhile, the clean energy boom depends on materials like lithium, cobalt, and copper - often sourced from regions with weak environmental and labour protections.

This convergence of environmental volatility and social fragility introduces significant business risks. Disruptions or unethical practices can cause operational setbacks, regulatory scrutiny, and reputational harm. Companies across sectors have learned that supplier behaviour directly reflects on the brand. Transparency, resilience, and responsible sourcing are no longer optional, but strategic priorities.

Why companies struggle to act
Despite rising awareness, only 24% of companies disclose Scope 3 emissions.3 Measuring and managing these emissions remains difficult due to poor visibility beyond first-tier suppliers and unclear ownership across value chains.

Internal misalignment adds to the challenge. Sustainability teams are often under-resourced, while procurement is driven by cost and delivery targets - not environmental outcomes. This weakens the ability to drive emissions reduction across the chain.

Data quality is another barrier. Many companies rely on industry averages rather than verified supplier data, limiting the credibility of their reporting. Smaller suppliers often lack the tools or funding to measure and report emissions.

Fragmented global regulations further complicate disclosure. Suppliers operate across jurisdictions with differing standards, making coordination difficult. Some firms even avoid Scope 3 reporting to steer clear of scrutiny over high emissions or data gaps.

Turning risk into opportunity
BCG estimates that up to 80% of supply chain emissions can be mitigated with technologies already on the market.4 Yet many of these solutions remain underused due to operational or cultural barriers.

Leading companies are turning supply-chain risks into strategic advantages. They redesign products using recycled or lower-carbon materials, improve packaging and logistics, and work closely with suppliers to reduce emissions. Some co-invest in clean technologies or require key suppliers to set climate targets.

Digital tools are accelerating action. AI-powered platforms enable real-time emissions tracking, while supplier scoring and emissions calculators help companies assess maturity, prioritize support, and track improvements across their value chain.

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Source: BCG (2021): Supply Chains as a Game-Changer in the Fight Against Climate Change

Why investors care
For investors, Scope 3 emissions are a critical lens for evaluating corporate climate risk, transition readiness, and long-term value creation. Unmanaged value-chain emissions expose companies to reputational, regulatory, and operational risks. In contrast, companies that manage Scope 3 show stronger governance and adaptability.

Scope 3 integration gives investors a clearer view of a company’s climate exposure, especially in high-impact sectors where value-chain emissions dominate. Leading frameworks emphasize Scope 3 to reflect financed emissions and transition risk.

Ultimately, Scope 3 transparency is more than a reporting issue. It’s a marker whether a company truly understands and is managing its full climate footprint.

The role of active ownership
Active ownership is a powerful lever for sustainable investing. Investors can drive change by setting expectations for value chain transparency, integrating Scope 3 into voting policies, and favouring companies with credible climate strategies.

Effective stewardship pushes best practice forward – such as aligning procurement with climate goals and embedding sustainability into corporate oversight. When applied consistently, it shifts capital toward companies managing value-chain risks and raises the bar across industries.

The road ahead
The path to net-zero emissions runs through the supply chain. As companies and investors look beyond the factory gate, the value chain emerges as both the largest source of emissions and the most powerful lever for change.

Credible climate leadership today means taking responsibility for the full climate footprint — not just direct emissions. The next phase of the transition will be driven not only by clean technology, but by the strength, transparency, and innovation embedded in global supply networks.

Sources:

1 CDP (2024): Strengthening the chain. Transform the norm.
https://cdn.cdp.net/cdp-production/cms/reports/documents/000/007/890/original/CDP_HSBC_Report_2024.pdf

2 WEF (2021): Net-Zero Challenge: The supply chain opportunity.
https://www3.weforum.org/docs/WEF_Net_Zero_Challenge_The_Supply_Chain_Opportunity_2021.pdf

3 Sustainalytics (2022): Scope 3 Supply Chain Emissions: Five Questions Investors Need to Know. 
https://www.sustainalytics.com/esg-research/resource/investors-esg-blog/scope-3-supply-chain-emissions--five-questions-investors-need-to-know

4 BCG (2021): Supply Chains as a Game-Changer in the Fight Against Climate Change.
https://web-assets.bcg.com/b3/79/e18102e14739bb2101a49d8e63f0/bcg-supply-chains-as-a-game-changer-in-the-fight-against-climate-change-mar-2021.pdf

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