Products based on natural raw materials such as wood are made by the natural process called photosynthesis, based on three very simple building blocks: water from the earth (H2O), carbon dioxide from the air (CO2) and light from the sun. The growth of a tree requires nothing but natural processes.
At the same time, wood absorbs CO2, i.e. removes CO2 from the atmosphere, and although greenhouse gas emissions must be added for wood cutting, transportation to the factory and production processes, a finished product, considered from cradle to gate, can in some cases remove more CO2 from the air than it emits. This means that the CO2 value will be negative. However, it is important to remember that it is currently only the first stages of the product life cycle that are included in the calculations. If end of life values were to be included, the result would be different depending on whether the wood would be burned for energy recovery or reused elsewere.