Tesco has achieved genuine operational decarbonization (65% Scope 1&2 reduction since 2015) and secured 100% renewable electricity via large corporate PPAs. However, Scope 3 emissions—representing 90% of its footprint—remain flat since 2020. Material supply chain failures include documented Amazon deforestation via Cargill soy and River Wye pollution from intensive chicken farming, both breaching stated commitments.
Same formula for every company. No curve. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleStrongest on Energy Source and Carbon Footprint — Operations (8/10, 7/10). Weakest on Water Impact and Nature & Biodiversity Impact (3/10, 4/10).
14 sources used in this assessment. All publicly available. Each row shows which rubric questions it informed.
11 of 14 sources are third-party verified or public record.
“Scope 1 emissions 802,425 tCO₂e; Scope 2 market-based 5,497 tCO₂e, FY2024/25”
“We engaged Deloitte LLP to provide independent limited assurance over our most critical KPIs”
“Tesco's 2020 cut-off date has been breached and indicates that its 2025 target is likely unachievable”
“Surpassing its 2025 goal, Tesco has slashed Scope 1 and 2 emissions by 65% from its baseline”
“Since 2020, Tesco's Scope 3 emissions have remained relatively stable”
“Tesco has sourced 100% of its electricity from renewable sources since 2020”
“The agreement secures 65% of the solar power generated from the Cleve Hill Solar Park”
“No evidence was found regarding the company's efforts to avoid ecosystem conversion, including deforestation”
“reached 87% kerbside recyclability for own-brand packaging and redistributed 82% of unsold food in the UK”
“more than 2.5 billion pieces of plastic have been removed from its own-brand products since 2019”
“intensive chicken production was ravaging the River Wye has been pulled as a result of their ongoing partnership”
“Tesco has been linked to intensive chicken production and the devastating pollution of the River Wye”
“Progress on the KPI is reported annually, with limited assurance from Tesco's external audit provider, currently Deloitte”
“one of the first retailers in the world to have its net zero targets validated by the Science Based Targets initiative”
If you believe a source has been misread or a newer version exists, submit a challenge.
Among the 43 major retail (non-fashion) brands we've scored, Tesco is tied =32nd of 43, with 1 other.
Score history begins 29 May 2026.
As Tesco's score updates, the trajectory will appear here.
We're backfilling historical scores for FTSE 100 and S&P 100 companies over the coming weeks.
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No challenges submitted yet. If you have evidence that contradicts this score, you can challenge any question above — cite a public source and we'll review it.
Tesco is the largest retailer in the UK and one of Europe's largest supermarket chains, operating grocery stores, convenience shops, and online delivery across multiple countries. Founded 1919, headquartered in Welwyn Garden City, it serves over 100 million customers weekly with 423,092 employees.
Largest US supermarket with similar Scope 3 decarbonization lag and supply chain deforestation exposure.
View breakdown →UK grocer peer with comparable GHG reporting, renewable energy transitions, and tropical commodity supply risk.
View breakdown →Consumer goods company with documented supply chain deforestation failures and TNFD disclosure pioneers.
View breakdown →Food conglomerate facing persistent supply chain biodiversity and water governance challenges despite net-zero commitments.
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