THE CYCLE OF NATURE
It is a virtuous cycle, where everything works together to keep our ecosystem in harmony. Thanks to the sun, and through the photosynthesis process, plants absorb carbon dioxide from the atmosphere, using the carbons that are necessary for their growth and releasing oxygen, essential to our life and that of the planet. Wood in trees is a product of photosynthesis, and is made up of carbon.
When wood is burnt using appropriate combustion (the Palazzetti Double Combustion)), carbon is combined with oxygen in the air and produces the exact quantity of carbon dioxide that was absorbed by the tree during its life cycle.
With wood nothing is wasted.
This is different with fossil fuels; they develop carbon dioxide, accumulated for thousands of years, when burning, and release it into the air, contributing to what is commonly called the greenhouse effect.

The symbols:
C = CARBON (WOOD)    |    O₂ = OXYGEN    |    CO₂ = CARBON DIOXIDE    |    CO = CARBON MONOXIDE