20 Essential Questions About Trees, Carbon, and Reforestation - Answered by ON A MISSION

At ON A MISSION, we get questions about trees all the time, and we love it.

We believe that curiosity is where climate action begins. Whether it’s someone wondering how much CO₂ a tree can absorb, or a business trying to understand how to make their sustainability goals more meaningful, we believe that asking great questions is the first step toward making a real impact.

So, we’ve pulled together some of the most common questions we hear, and answered them in a simple, fun, and approachable way. Whether you’re just dipping your toe into the world of reforestation or you're a full-blown climate champion, there’s something here for you.

Let’s get going and see if you learn something new.

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1. How Do Trees Help the Environment?

Let’s start with the basics. Trees are like the overachievers of the natural world.

Trees absorb CO₂, release oxygen, filter air and water, stabilize soils, and provide crucial habitat for wildlife—making them indispensable for healthy ecosystems. UNEP FI

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2. How Many Trees Are in the World?

There are an estimated 3 trillion trees on Earth, sounds like a lot, right? But we’re losing more than 10 million hectares of forest each year due to deforestation, agriculture, and development. That’s roughly the size of Portugal… every year. Nature

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3. How Much CO₂ Does One Tree Absorb Per Year?

A healthy, mature tree can absorb around 22 kilograms of CO₂ per year. That number depends on the species and environment, but even one tree plays its part. One Tree Planted

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4. Can Planting Trees Stop Climate Change?

Not all by themselves, but they help a lot. Trees are one of the most scalable, natural ways to remove CO₂ from the atmosphere. But we also need to reduce emissions, protect existing forests, and rethink how we live and consume. TIME

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5. What Are Nature-Based Solutions?

Nature-based solutions are actions that protect, manage, or restore ecosystems—such as reforestation, wetland restoration, or agroforestry—to address societal challenges while delivering environmental and social benefits. Nature-based Solutions Initiative

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6. What’s the Difference Between Afforestation and Reforestation?‍

Afforestation is planting trees in areas that weren’t previously forested.‍

Reforestation is restoring trees to places that once were forests but got cleared.

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7. Which Trees Absorb the Most Carbon?

Fast-growing hardwoods—like poplar, willow, and eucalyptus—sequester carbon rapidly, though locally native species often yield the best long-term ecological outcomes. MDPI

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8. What Are the Social Benefits of Tree Planting?

Tree planting creates jobs (in nurseries, planting, and monitoring), improves food and water security, provides medicinal resources, and bolsters community resilience. EcoMatcher

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9. How Many Trees Would I Need to Plant to Offset My Footprint?

With an average annual footprint of 10 tonnes of CO₂ and 22 kg sequestered per tree, you’d need to plant roughly 450 trees each year to fully offset your emissions. One Tree Planted

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10. How Can Businesses Support Reforestation?

Companies can fund and co-design projects, integrate reforestation into their sustainability strategies, or partner with NGOs—just as global brands are doing today to restore critical landscapes. Reuters

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11. What Makes a Good Reforestation Project?

Look for community leadership, native-species planting, long-term monitoring (via satellite and field surveys), and clear social and ecological benefits. TIME

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12. What Are the UN Sustainable Development Goals Related to Forests?

• SDG 13: Climate Action
• SDG 15: Life on Land
• SDG 12: Responsible Consumption & Production

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13. How Can I Tell If a Reforestation Project Is Legit?

Seek transparency in data and budgets, third-party verification, and regular impact reports on trees planted, carbon sequestered, and community outcomes. TIME

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14. Where Are the Biggest Reforestation Efforts Happening?

Massive initiatives are underway in Brazil, Kenya, Madagascar, Indonesia, and India, often backed by international coalitions and public–private partnerships. Reuters

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15. What Is ON A MISSION’s Approach to Reforestation?

We deliver community-led, science-backed projects that restore degraded landscapes, empower local livelihoods, and ensure ecological resilience for generations to come. UNEP FI

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16. How Do You Measure the Impact of Reforestation?

We track trees planted and survival rates, tonnes of CO₂ sequestered, biodiversity gains, and jobs created—using satellite monitoring, MRV tools, and on-the-ground surveys. Nature-based Solutions Initiative

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17. How Do I Support ON A MISSION?

You can donate, volunteer your skills, or partner with us as a business to co-create tailored carbon-neutral solutions. Learn more at onamission.world.

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18. Why Does Tree Planting Matter Now More Than Ever?

Facing a climate emergency, trees remain one of the most scalable, cost-effective, and community-centered ways to restore balance—making immediate action crucial today. TIME

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Got more questions? We’re here for them

At ON A MISSION, we’re all about making climate action accessible, grounded, and personal. If you’ve got a question that didn’t get answered here, just reach out. We love hearing from people who care, because that’s how change starts.

Ready to grow something meaningful? Let’s plant together.

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👉 Contact us at hello@onamission.world