SINK Blog

Data-driven sustainability insights from the SINK database.

Data12 Jul 2026

Eleven of Europe's 20 Biggest Airlines Have Been Caught Greenwashing. We Scored All of Them.

Courts, the ASA and the European Commission have all ruled against European airlines' green claims. We scored the twenty biggest on their public data. Top score: 35 out of 100. Every source shown.

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Retail30 May 2026

We scored Britain's "healthy" snack brands on sustainability — and the "natural" ones came last.

Pip & Nut: 55. Graze: 44. Eat Natural: 31. We scored seven of Britain's best-known healthy snack brands — and a B Corp logo or the word "natural" on the packet didn't save them.

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Retail29 May 2026

We scored every UK supermarket on sustainability

We scored every UK supermarket on sustainability. The Co-op leads at 50. ASDA is alone at the bottom at 31. No supermarket scored above 50.

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Fashion13 Apr 2026

We scored every fast fashion brand on sustainability. Here's what we found.

Fashion Nova: 8. SHEIN: 15. H&M: 40. Not a single fast fashion brand scored above 40/100. Here's what drives the gap between fast fashion and sustainable brands.

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Data11 Apr 2026

We scored 500+ companies on sustainability. Here's what we found.

The average SINK score is 38/100. No company has broken 75. Fast fashion is the worst sector. Here are the headline findings from our database.

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HOW SINK STAYS INDEPENDENT

Readers and institutions support our work. Companies can pay to submit evidence we couldn't find. Neither type of payment changes a score.