Scope 3 Emissions Offsetting: How the Cork Oak Regrows Its Bark

The cork oak (Quercus suber) is nature’s original renewable resource: it regrows its bark every decade, allowing people to harvest cork without harming the tree. This remarkable trait makes the cork oak a living symbol of regeneration—and offers lessons for climate action and Scope 3 emissions offsetting strategies.

The surprising science of living bark harvest

The cork oak is native to the Mediterranean, especially Portugal and Spain. Its thick, rugged bark has protected it against wildfire for millennia. What’s unique? Skilled harvesters carefully strip off the bark by hand every 9 to 12 years—without cutting down or killing the tree.

• Regrow and repeat: After harvest, new cork bark grows back thicker and smoother than before.
• Lifespan: A single cork oak can live up to 200 years, supporting generations of harvest.
• Biodiversity powerhouse: Cork oak woodlands are some of Europe’s most diverse habitats, sheltering rare birds, insects, and mammals.

What does this have to do with Scope 3 emissions offsetting?

Scope 3 emissions offsetting refers to tracking and reducing emissions that are not directly produced by a business, but result from activities in its value chain—like purchased goods, transportation, waste, and the use of sold products. For many organizations, these emissions form the largest portion of their climate impact.

Like the cork oak’s renewal cycle, robust offsetting programs can achieve positive climate impacts when they focus on restoration rather than extraction. Cork harvesters preserve the land, benefiting the ecosystem while delivering a renewable resource. This mirrors how climate strategies should aim to give back to nature—even as they support business goals.

Regenerative forestry and the circular economy

Cork oak woodlands are managed using traditional practices that encourage regrowth, biodiversity, and local livelihoods. When companies invest in sustainable resource use or support reforestation projects, they help build circular systems: outputs that renew themselves, reduce waste, and support the resilience of forests and communities.

• FSC and PEFC certifications help ensure cork is harvested responsibly.
• Forest restoration, like Evertreen’s projects, contributes to long-term carbon absorption and biodiversity.

How to include nature-based solutions in your Scope 3 strategy

There’s growing interest in natural climate solutions–using forests, grasslands, and even cork oak woodlands to sequester carbon over decades. While offsetting is just one part of a credible Scope 3 approach (and always secondary to actual emission reductions), investing in projects that regenerate ecosystems—rather than simply compensate for extraction—offers clear environmental and social co-benefits.

• Support reforestation projects that work with local communities.
• Look for biodiversity and local job creation, not just CO2 estimates.
• Ensure claims are grounded: nature-based projects deliver estimated, long-term benefits, not instant fixes.

Frequently asked questions

How is cork harvested without harming the tree?

Skilled harvesters carefully cut and peel the outer bark, leaving the living inner layer intact. The tree heals and regrows its protective cork over 9–12 years.

Why do cork oak forests matter for emissions?

Cork oak woodlands store carbon, support biodiversity, and enable local circular economies—making them a nature-based climate solution and a model for offsetting programs.

What are Scope 3 emissions, and why do they matter?

Scope 3 emissions are all indirect greenhouse gas emissions that occur throughout a company’s value chain. For businesses, these often represent the majority of their climate impact and are key to address for net-zero ambitions.

How does reforestation help offset Scope 3 emissions?

Sponsoring reforestation projects can contribute to estimated long-term carbon removal and biodiversity, helping organizations support climate action beyond their own operations.

To learn more about nature-based climate contributions and restoration, see our forestry projects or read about how we estimate tree CO2 impacts.