Forests & Climate: Why Forest Conservation Matters in 2026

What Are Forests and Why Do They Matter?

The Food and Agriculture Organization of the United Nations estimates that the planet has about 4.06 billion hectares of forests, covering roughly 31% of Earth’s land area. That is a vast living system, but not an unlimited one.

Forests are more than collections of trees. They are carbon stores, rainfall engines, wildlife habitat, food systems, water filters, cultural landscapes, and economic foundations. A tropical rainforest in the Amazon, a peat swamp forest in Indonesia, a miombo woodland in southern Africa, and a boreal forest in Canada all meet the broad definition of forest, yet each functions differently.

What links them is structure and life. Forests hold trees, understory plants, fungi, insects, birds, mammals, soils, streams, and microbial communities in layered relationships that can take centuries to form. Old-growth forests are especially valuable because they store large amounts of carbon and support specialized species that cannot easily survive in simplified landscapes.

The FAO’s Global Forest Resources Assessment 2020 reports that more than one-third of the world’s forests are primary forests: naturally regenerated forests of native species with no clearly visible signs of human disturbance. These forests are disproportionately important for biodiversity and climate stability. Once cleared, they cannot be quickly replaced by plantations.

Forests also support people directly. The World Bank and UN agencies have long estimated that hundreds of millions of people depend on forests for livelihoods, fuelwood, wild foods, medicine, construction materials, and income. In many rural regions, forest products are not luxuries. They are part of household survival.

The stakes are practical. When forests are cleared, communities can lose shade, rainfall reliability, soil fertility, pollinators, clean water, and protection from floods. When forests remain healthy, they quietly reduce risks that would otherwise become expensive disasters.

The Role of Forests in Climate Regulation

The Intergovernmental Panel on Climate Change’s Sixth Assessment Report finds that forests and other terrestrial ecosystems are central to the global carbon cycle, with forests absorbing roughly 2.6 billion tonnes of carbon dioxide per year. That annual uptake is one reason climate change is not moving even faster.

Trees remove carbon dioxide from the atmosphere through photosynthesis and store carbon in trunks, branches, roots, leaves, deadwood, and soils. Tropical forests often store enormous carbon stocks above ground, while peat forests and boreal forests can hold even larger reserves in soil. Disturb those soils, and emissions can continue for years.

The climate value of forests is not limited to carbon. Forests cool landscapes through shade and evapotranspiration, the process by which water moves from soil and vegetation into the atmosphere. In the Amazon Basin, this moisture recycling helps sustain rainfall across large parts of South America. Scientists often describe the forest as a biotic pump because it helps move water inland.

This matters for agriculture. Soy, maize, cattle pasture, hydropower, and urban water supplies across Brazil, Bolivia, Paraguay, and Argentina are linked to rainfall patterns influenced by the Amazon. Forest loss can therefore damage the very economic systems that often drive clearing.

In the Congo Basin, the world’s second-largest tropical rainforest, forests regulate regional rainfall and store vast carbon stocks in trees and peatlands. Research published in recent years has highlighted the Cuvette Centrale peatlands, spanning parts of the Republic of the Congo and the Democratic Republic of the Congo, as one of the largest tropical peat carbon stores on Earth. Drainage, road building, logging, and fire could turn that store into a major emissions source.

Southeast Asia shows the danger clearly. Indonesia’s peatland fires in 2015 released huge quantities of greenhouse gases and produced severe haze across the region. The lesson was blunt: when carbon-rich forests and peatlands burn, local land-use decisions become global climate events.

Forests also help buffer extreme heat. Urban forests can reduce local temperatures, while intact mountain forests stabilize slopes and moderate water flows. In a warmer climate, these services become more valuable, not less.

Global Deforestation: Causes and Scale

FAO data show that the world lost forests at an estimated rate of 10 million hectares per year from 2015 to 2020. That is an area roughly the size of South Korea disappearing annually.

The causes vary by region, but agriculture dominates. In the tropics, forests are often cleared for cattle pasture, soy, palm oil, cocoa, rubber, coffee, smallholder farming, mining, roads, and settlement. Some clearing is legal. Much is not. The result is the same: carbon leaves the land, habitat fragments, and local climates shift.

In the Brazilian Amazon, cattle ranching has historically been the largest driver of deforestation. Roads open access, land speculation follows, and forest is converted into pasture. Soy expansion can add pressure, directly through clearing and indirectly by pushing cattle frontiers deeper into forest regions.

In Southeast Asia, palm oil and pulpwood plantations have transformed large areas of lowland rainforest in Indonesia and Malaysia. The industry has improved in some areas through certification, corporate no-deforestation pledges, and satellite monitoring, but enforcement gaps remain. A plantation is not the same as a forest. It may contain trees, but it usually lacks the structure, species diversity, and carbon stability of the ecosystem it replaced.

In the Congo Basin, industrial logging, fuelwood demand, mining, agricultural expansion, and infrastructure projects are major pressures. Deforestation rates have historically been lower than in parts of the Amazon or Southeast Asia, but the risk is rising as roads, population growth, and global commodity demand expand.

Deforestation is only part of the problem. Forest degradation can be harder to see from the ground and sometimes harder to measure from space. Selective logging, repeated fires, edge effects, hunting, invasive species, and drought can reduce a forest’s carbon storage and biodiversity without fully removing tree cover. A degraded forest may still look green from above while losing ecological function below the canopy.

Climate change is now compounding land-use pressure. Heat, drought, storms, pests, and fire are weakening forests in many regions. Boreal forests in Canada and Siberia have experienced increasingly severe fire seasons. In the western United States, hotter and drier conditions have contributed to larger wildfires and tree mortality. Forests are climate solutions, but they are also climate victims.

Forest Biodiversity and Wildlife Habitat

The FAO and UNEP report The State of the World’s Forests 2020 states that forests contain about 60,000 tree species and provide habitat for 80% of amphibian species, 75% of bird species, and 68% of mammal species. Those numbers explain why forest conservation is inseparable from biodiversity protection.

A forest is habitat because it offers food, shelter, nesting sites, movement corridors, and microclimates. The canopy may host birds, primates, orchids, and insects. The understory may support reptiles, seedlings, fungi, and pollinators. The soil may contain vast microbial diversity that supports nutrient cycling.

When forests are fragmented, wildlife populations become isolated. Edges become hotter, drier, and windier. Predators, fires, invasive species, and human activity penetrate deeper. Species that need large territories suffer first.

The Amazon is home to jaguars, harpy eagles, pink river dolphins, poison dart frogs, and thousands of plant species. Many are still poorly studied. Scientists warn that continued deforestation, drought, and fire could push parts of the Amazon toward a tipping point where rainforest shifts into a more open, degraded ecosystem. That would be a biodiversity crisis and a climate crisis at once.

In the Congo Basin, forest elephants disperse seeds and shape forest structure. Their decline from poaching and habitat loss affects not only wildlife populations but also the composition of forests themselves. Large animals are part of how forests function.

In Southeast Asia, orangutans in Borneo and Sumatra have become symbols of forest loss, but they are not alone. Hornbills, clouded leopards, gibbons, sun bears, and countless amphibians and insects depend on intact forest. Many species cannot survive in oil palm landscapes, even when those landscapes retain narrow strips of vegetation.

Mangrove forests deserve special attention. UNEP has reported that mangroves support rich coastal biodiversity while storing large amounts of “blue carbon” in soils. They protect shorelines from storm surge, support fisheries, and provide nursery habitat for marine life. Yet mangroves have been cleared for shrimp ponds, coastal development, and fuelwood. Restoring them can bring climate, biodiversity, and community benefits together.

Biodiversity is often treated as scenery. It is infrastructure. Pollination, pest control, seed dispersal, water purification, and disease regulation depend on living systems that forests help maintain.

Reforestation and Forest Restoration Efforts

The Bonn Challenge aims to bring 350 million hectares of degraded and deforested landscapes into restoration by 2030. That scale sounds ambitious because it has to be.

Reforestation means replanting trees where forests were removed. Restoration is broader. It can include natural regeneration, assisted regeneration, agroforestry, fire management, invasive species control, wetland rewetting, and returning native species to degraded land. The best approach depends on ecology and community needs.

Natural regeneration is often cheaper and more effective than mass planting when seed sources, soils, and rainfall remain suitable. In parts of Costa Rica, forest cover rebounded after agricultural pressure declined and policies supported conservation. Payments for ecosystem services helped landowners keep or restore forests. The country is frequently cited because it shows that forest recovery can happen with aligned incentives, governance, and tourism value.

Tree planting can help, but poor projects fail. Planting a single fast-growing species on grassland, peatland, or native savanna can damage biodiversity and water supplies. Counting seedlings is not the same as restoring forests. Survival rates, native species mix, long-term management, land rights, and ecological suitability matter more than launch-day numbers.

China’s large-scale reforestation and ecological restoration programs have increased tree cover in many regions, but researchers have also pointed to tradeoffs where plantations use scarce water or offer limited habitat value. The lesson is not that planting is wrong. The lesson is that forest policy must distinguish between tree cover and healthy forests.

In Brazil, restoration of degraded pasture and riparian forests could help meet climate goals while reducing pressure to clear new land. In Indonesia, peatland restoration requires blocking drainage canals, rewetting peat, preventing fire, and supporting local livelihoods that do not require burning. In Africa’s Sahel, farmer-managed natural regeneration has restored trees across agricultural landscapes by protecting regrowth from existing root systems.

Restoration also has a timing problem. Mature forests store carbon accumulated over decades or centuries. New forests need time. That means restoration cannot be used as an excuse to clear intact forests now. Protecting existing forests usually delivers larger and faster climate benefits than planting new ones.

The strongest restoration efforts combine ecology with economics. Farmers need secure land tenure. Communities need income. Governments need enforcement. Investors need credible monitoring. Forests recover when the people living near them have reasons and rights to keep them standing.

Indigenous Communities and Sustainable Forest Management

Studies across the Amazon have repeatedly found that Indigenous territories often have lower deforestation rates than surrounding lands. This is not accidental.

Indigenous peoples and local communities manage or hold customary rights to large areas of the world’s forests. Their knowledge is practical, place-based, and accumulated across generations. It includes fire management, hunting rules, sacred sites, rotational harvesting, agroforestry, medicinal plants, and seasonal indicators that formal management systems often overlook.

In Brazil, Indigenous territories have served as barriers against deforestation in parts of the Amazon, even under intense pressure from illegal mining, logging, ranching, and land grabbing. Where rights are recognized and enforcement exists, forests tend to fare better. Where rights are weakened, violence and clearing often rise.

In the Congo Basin, community forestry has potential to support livelihoods while maintaining forest cover, but outcomes depend on governance, market access, technical support, and protection from outside exploitation. A legal title alone is not enough if communities lack resources to defend it.

In Southeast Asia, Indigenous and customary communities have long managed forests through mixed systems of swidden farming, forest gardens, sacred groves, and rotational use. Some practices have been wrongly portrayed as destructive when, in fact, they can maintain mosaics of forest, fallow, and farmland over long periods. The real damage often comes from industrial-scale conversion, not subsistence systems.

Sustainable forest management does not mean locking every forest away from human use. It means managing harvests, roads, fires, hunting, and regeneration so that forests retain carbon, biodiversity, water, and cultural values over time. Certification systems such as the Forest Stewardship Council can help in some markets, though they depend on strong audits and enforcement.

Finance is a major issue. Programs such as REDD+, designed to reduce emissions from deforestation and forest degradation, have promised payments for forest protection. Results have been mixed. Some projects have brought income and conservation gains; others have faced criticism over carbon accounting, land rights, and benefit sharing. The credibility test is simple: do forests remain standing, do emissions fall, and do local people benefit fairly?

Forest conservation works best when it is not imposed from a distant capital or corporate office. Durable protection requires consent, rights, monitoring, and accountability.

The Future of Forests: Projections and Policy

The IPCC warns that limiting warming to 1.5°C or well below 2°C requires rapid emissions cuts across energy, industry, transport, food systems, and land use. Forests cannot compensate for continued fossil fuel expansion, but climate targets become far harder without them.

By 2026, forest policy is moving through three linked arenas: national climate pledges, biodiversity commitments, and commodity supply chains. The Kunming-Montreal Global Biodiversity Framework calls for conserving at least 30% of land and sea by 2030, while many countries have pledged to halt and reverse forest loss. The gap is implementation.

One major shift is transparency. Satellite platforms such as Global Forest Watch, national monitoring systems, and public deforestation alerts now make forest loss visible faster than before. Governments, journalists, prosecutors, investors, and communities can track clearing in near real time. Visibility does not automatically stop deforestation, but it changes the politics of denial.

Trade rules are also tightening. The European Union’s deforestation regulation targets commodities such as cattle, soy, palm oil, coffee, cocoa, rubber, and wood linked to recent deforestation. Its effectiveness will depend on enforcement, smallholder inclusion, and whether producer countries strengthen land governance rather than simply redirect high-risk commodities to less regulated markets.

The Amazon’s future remains one of the biggest climate uncertainties. If deforestation, fire, and drought continue to intensify, parts of the forest could lose resilience. If Brazil and neighboring countries strengthen enforcement, support Indigenous territories, restore degraded land, and shift agricultural growth onto already-cleared areas, the region could remain a climate stabilizer.

The Congo Basin stands at a different crossroads. It still contains vast intact forests, but pressure is rising. International finance should reward protection before destruction becomes profitable. Waiting until deforestation accelerates would repeat mistakes made elsewhere.

Southeast Asia shows both warning and progress. Indonesia has reduced deforestation in recent years compared with peak periods, aided by moratoria, peatland policies, corporate pressure, and wetter conditions in some years. Yet risks remain from nickel mining, plantation expansion, infrastructure, and fires during dry El Niño periods.

The policy path is clear even if execution is difficult. Protect primary forests. Recognize Indigenous and community land rights. Shift food production away from forest frontiers. Restore degraded lands with native ecosystems where possible. Make commodity supply chains traceable. Fund conservation at a scale that competes with extraction. Treat fire prevention, peat protection, and forest law enforcement as climate policy.

Forests are not a side issue in 2026. They are one of the planet’s largest living climate systems, a foundation for biodiversity, and a test of whether governments can protect long-term public goods against short-term pressure. The numbers are stark: 4.06 billion hectares remain, about 10 million hectares are still being lost each year, and billions of tonnes of carbon dioxide move through forests annually. What happens next depends less on knowing the value of forests than on acting as if that value is real.