Explain’d: Reforestation

Restoring ecosystems, redesigning impact

At Colectivo, we believe sustainability must be measurable and actionable to be effective. Explain’d is our series focused on clarifying the concepts shaping how organisations operate in a changing world. Today, we explore Reforestation, one of the most visible and widely discussed climate solutions, yet often misunderstood in practice.

What is Reforestation?

Reforestation refers to: “The re-establishment of forest through planting and/or deliberate seeding on land classified as forest.” - FAO Forest Resources Assessment

Unlike afforestation, which involves planting trees in areas that were not previously forested, reforestation focuses on restoring ecosystems that once existed. This distinction is important. Reforestation is not just about planting trees. It is about restoring ecological systems.

Where Does the Concept Come From?

Reforestation as a practice dates back centuries, particularly in regions where forests were heavily exploited for agriculture and industrial use. However, it became formalised as a policy concept in the 19th and 20th centuries, as governments began recognising the long-term risks of deforestation, including soil degradation, water instability, and resource depletion. In modern sustainability discourse, reforestation gained renewed importance through global climate frameworks, where forests became recognised as critical carbon sinks.

Key Anchor Moments

Understanding reforestation today requires looking at a few key milestones:

1992: United Nations Earth SummitPlaced forests at the centre of global environmental discussions, linking them to biodiversity and sustainable development.

1997: Kyoto ProtocolRecognised reforestation as a mechanism for carbon sequestration within climate policy.UNFCCC Kyoto Protocol Overview

2011: Bonn ChallengeLaunched a global effort to restore degraded land at scale.Bonn Challenge Initiative

2021: UN Decade on Ecosystem RestorationFramed ecosystem restoration, including reforestation, as central to addressing climate and biodiversity crises.UN Decade on Ecosystem Restoration

Why It Matters Now

Reforestation is often presented as a simple solution: plant more trees to absorb carbon. But the reality is more complex.

Forests are critical for:

• Carbon sequestration

• Biodiversity protection

• Water cycle regulation

• Soil health

However, not all reforestation efforts deliver the same impact. “Tree planting is not always a simple solution and can harm biodiversity if poorly planned.” - IPBES Global Assessment Report

This is why the focus is shifting from tree planting → to ecosystem restoration.

Reforestation and Business

For organisations, reforestation is increasingly linked to:

• Carbon offsetting

• Net-zero strategies

• ESG commitments

• Nature-based solutions

But this raises an important challenge: Nature-related risks and opportunities must be assessed alongside climate-related ones. There is growing scrutiny around how reforestation is used, particularly when it serves as a substitute for reducing emissions rather than complementing it.

From Planting Trees to Designing Systems

At Colectivo, we approach reforestation through a systems lens. The goal is not simply to plant more trees, it is to understand how ecosystems function and how business decisions interact with them.

This means asking:

• Where does our impact on land and nature come from?

• How do we reduce pressure before restoring ecosystems?

• How do we ensure restoration efforts are credible and long-term?

Reforestation becomes meaningful when it is part of a broader strategy.

Looking Ahead

Reforestation will continue to play a critical role in climate and biodiversity strategies. But its effectiveness depends on how it is implemented.

The shift is clear:

• From quantity → to quality

• From offsetting → to responsibility

• From planting trees → to restoring systems

Because ultimately, reforestation is not just about what we plant. It is about what we rebuild. At Colectivo, we are proud to collaborate with organisations like Green Belt, who have “planted more than 500 million trees across Ireland since 1982” to help boost knowledge and action.