Trees & Deforestation a Global perspective.

The PAX team on February 13, 2026

Author: Dr. Laurence Hewick, PhD.

Deforestation refers to the clearing of forests. It has wide-ranging negative effects, including climate change, biodiversity loss, soil erosion, and water cycle disruption, impacting both the environment and human populations. Biggest global cause of biodiversity loss is deforestation. The Earth loses about 38,610 square miles of forest every year. Ninety-six percent of global deforestation occurs in tropical forests. More than half of the planet’s tropical rainforests have been destroyed or degraded. Due to deforestation, as many as 28,000 species are predicted to become extinct by 2050.

Trees significantly benefit the environment by absorbing carbon dioxide, releasing oxygen, filtering air and water, providing habitat for wildlife, and mitigating climate change. Most importantly trees give us oxygen through a process called photosynthesis. Trees absorb carbon dioxide from the air and release oxygen as a result. Trees use energy from the sun to convert water and carbon dioxide from the soil into oxygen. The oxygen is released into the air we human’s breath in and we cannot live without it!

The amount of oxygen a tree produces depends on its age, species, health, and environmental conditions.  Older and more mature trees produce more oxygen. Some tree species, like beech, maple, pine, and spruce, produce more oxygen than others. A large tree can provide enough oxygen for up to four people in a day. They are the world’s best technology for cleaning the air!

Trees help the environment:

Trees absorb carbon dioxide (CO2) from the atmosphere through photosynthesis, storing it in their wood and biomass. This process helps to reduce the concentration of greenhouse gases in the atmosphere, mitigating the effects of climate change. A mature tree can absorb a significant amount of CO2 annually, equivalent to a half a metric ton.

Trees help clean the air by absorbing pollutants like nitrogen oxides, ozone, and carbon monoxide, and by filtering dust and smoke. They also filter water by absorbing pollutants and preventing runoff, which can lead to water pollution and flooding.

Trees provide essential habitats for a wide variety of plants and animals, supporting biodiversity and ecosystem health. They also help prevent soil erosion and landslides, which can damage habitats and ecosystems.

Trees help regulate the water cycle by absorbing rainfall and releasing water vapor into the atmosphere. They also provide shade and help cool urban areas, reducing the urban heat island effect. Trees can also help prevent flooding by absorbing excess water and slowing down runoff.

Global Geography of Trees:

The countries with the most trees, and therefore the largest forested areas, are:

  • Russia: Holds the largest area of forest, with an estimated 642 billion trees and covers almost about 50% of their country.
  • Canada: Has the second-largest tree population, with roughly 318 billion trees, and its forests cover almost 40% of the country.
  • Brazil: Home to much of the Amazon rainforest, Brazil has a large rain forest coverage with 302 billion trees.
  • United States: The US has 228 billion trees, with roughly 30% of the country covered in forests.
  • China: Has 140 billion trees, which covers approximately 23% of its territory.

Impacts of Deforestation.

  • Climate Change: Deforestation contributes to climate change by releasing stored carbon into the atmosphere and reducing the planet’s capacity to absorb carbon dioxide, a major greenhouse gas.
  • Biodiversity Loss: Forests are homes to a vast array of species, and deforestation leads to habitat loss and fragmentation, driving many species towards extinction.
  • Soil Erosion: Trees and plants anchor the soil, and their removal leaves it vulnerable to erosion by wind and rain, leading to landslides and reduced soil fertility.
  • Water Cycle Disruption: Forests play a crucial role in regulating the water cycle, and deforestation can disrupt rainfall patterns, reduce groundwater recharge, and increase the risk of floods.
  • Desertification: Deforestation can lead to desertification, where fertile land turns into desert-like areas.
  • Reduced Oxygen Production: Trees produce oxygen, and deforestation reduces the amount of oxygen available in the atmosphere.
  • Increased Greenhouse Gases: Deforestation releases carbon dioxide, a greenhouse gas, into the atmosphere, contributing to global warming.

Impacts on Human Populations:

  • Food Security: Deforestation can lead to reduced agricultural productivity and food shortages, particularly in regions heavily reliant on forest resources.
  • Economic Impacts: Deforestation can negatively impact local economies that depend on forest products, such as timber and tourism.
  • Health Impacts: Deforestation can lead to increased exposure to pollutants and infectious diseases, as well as reduced access to clean water and sanitation.
  • Displacement of Indigenous People: Deforestation can displace indigenous communities who depend on forests for their livelihoods and cultural practices.
  • Increased Flooding: Deforestation can increase the risk of flooding by reducing the soil’s ability to absorb water.

The major causes of deforestation are population demand for lumber as a construction material. Forest fires, mostly caused by climate change. Conversion of the land to cattle ranching and lastly mining.

What are the Worst countries in world for deforestation?

Based on recent data (2015–2024), the top five countries with the highest rates of deforestation, driven by agricultural expansion, logging, and infrastructure development, are generally considered to be:

  1. Brazil: Consistently ranks as the highest in the world, with massive losses in the Amazon due to cattle ranching and soy production.
  2. Indonesia: Experienced significant forest loss for palm oil plantations and logging, although rates have fluctuated.
  3. Democratic Republic of the Congo (DRC): Faces high deforestation due to small-scale agriculture, charcoal production, and logging.
  4. Bolivia: Recently saw record-high deforestation, largely driven by large-scale agricultural expansion and forest fires.
  5. Angola/Tanzania: Frequently listed due to rapid forest loss from land clearing for agriculture and housing.

NOTE: Shortly after taking office in 2025, Donald Trump promised to rapidly expand the US timber industry, pledging to increase logging on federal lands by 25%. He aimed to fulfill this promise through a series of executive actions aimed at removing regulatory barriers and increasing domestic production to reduce reliance on imported wood products.

Who are the top 5 countries in the world for forestry management?

Based on sustainable practices, innovation, and industry management, the top countries for forestry management are generally recognized as Finland, Sweden, Canada, Germany, Rwanda and Costa Rica. These nations excel through a combination of mandatory reforestation laws, high-tech sustainable harvesting, and advanced conservation efforts.

  • Finland & Sweden: Renowned for long-term sustainable forestry, where laws often require planting more trees than are harvested, sustaining high-value pulp and paper industries.
  • Canada: Possesses extensive, stringently managed forests with a focus on sustainable development and vast certification programs.
  • Germany: Known for a historical commitment to sustainable forestry and high- value, efficient, and structured timber production.
  • Rwanda: for reforestation and conservation efforts.
  • Costa Rica: for preserving the rain forests as a source of tourism.

In conclusion trees are not just aesthetic additions; they are active, indispensable components of Earth’s ecosystem, functioning as the planet’s “lungs” by absorbing CO2, releasing oxygen, and acting as natural, energy-efficient air conditioners. So go ahead and “hug a tree” and feel good about it.