Trees: Nature’s allies for cleaner air and a healthier future

Trees play a vital role in human life. They help improve the quality of the air we breathe while contributing to environmental protection and the fight against climate change.

As they grow, trees absorb carbon dioxide (CO₂) from the atmosphere and use it during photosynthesis to produce organic matter. As part of this natural process, they release oxygen (O₂) into the atmosphere a gas essential for the respiration of humans and animals.

Beyond producing oxygen, trees also help reduce certain air pollutants. Their leaves can trap airborne particles, including dust, helping to improve air quality.

Trees are also a critical ally in the fight against climate change. They absorb and store carbon in their biomass and in soils, helping to reduce the amount of CO₂ in the atmosphere.

Forests, green spaces and trees planted in urban areas therefore play an important role in creating healthier, cooler and more pleasant environments that support the health and well-being of communities.

“You can feel the difference when there are trees”

For Diane, the presence of trees is particularly noticeable when moving through different parts of Kigali. She says tree-covered areas provide a sense of freshness and well-being.

“When I am at home and the heat becomes intense, I sit under the trees around my home and I immediately feel better. When you take the road towards the Presidential Office or pass near Nyandungu Eco-Park, you can really feel the difference. The air is more pleasant, and there is a cool, humid breeze that creates a sense of well-being. But as soon as you leave these green spaces, you feel as though something is missing.”

Diane also stresses that protecting trees and forests should be a collective responsibility.

“Protecting forests, planting trees and preserving the ones that already exist should be everyone’s responsibility. When we plant trees, we help maintain better air quality and protect our health and the health of future generations.”

Trees: essential for clean air

Former Rwandan Minister of Environment, Dr. Vincent Biruta, previously highlighted the importance of increasing the number of trees in public spaces, including gardens, along roads, in public gathering places and at tourist sites.

“Trees absorb carbon dioxide and air pollutants, and help cool the air.”

Dr. Jeanne d’Arc Mujawamariya, who served as Rwanda’s Minister of Environment from 2019 to 2024, also emphasized the importance of environmental protection in improving air quality in her message, “Clean skies, healthy people.”

She highlighted Rwanda’s efforts to expand and restore forest cover, as well as the importance of annual tree-planting campaigns aimed at restoring degraded forests.

“Protecting the quality of the air we breathe also requires conserving forests and sustaining efforts to plant trees.”

Key terms to know

Carbon dioxide (CO₂): A naturally occurring gas in the atmosphere. However, when it accumulates in large quantities, it contributes to global warming and climate change.

Photosynthesis: The natural process through which trees and other plants use sunlight, water and carbon dioxide to produce organic matter and release oxygen into the atmosphere.

Oxygen (O₂): A gas essential for the respiration of humans and animals and fundamental to life.

Protect trees, protect our future.

By planting and protecting trees today, we are helping to safeguard the air we breathe, our health and our environment for generations to come. Trees are more than a natural resource they are essential allies in building healthier, greener and more resilient communities.