The cells of plants are small chemical factories where chemical substances are converted into other substances, substances are broken down and substances are formed.
The quality of the air in which we live is essentially important to our health, our fitness and our well-being.
This is not only the case for the open air, but certainly for the air in the rooms in which we spend a large part of our lives: the living room, the office, the classroom. The air quality in these spaces is contaminated by chemical substances that are not only released from furniture, clothing, floor covering, wall covering, paint, printers etc. etc., but also by people themselves. Extensive scientific research has shown that plants are capable of absorbing these substances from the air, cleaning the air in that way.
The plant can convert unhealthy substances into other substances, which can serve as food the plant, for example,
or are transported to other parts of the plant. In order to achieve this, these substances from the air must reach the
interior of the plant, the cells. And so the plants have to absorb these substances from the air.
The leaves of many plants are specialised in absorbing substances from the air. After all, the CO2
in the air has to be absorbed so that it can be converted into sugars and oxygen using light, and the oxygen produced in this way must be released to the air. Other substances that are present in the air also penetrate the plant via this absorption-route, and water evaporates from the plant as well.
The absorption of substances from the air by the leaves is a well regulated process. There are special entrance
gates in the leaves that regulate the exchange of substances between the open air and the interior of the leaf.
These small gates, the stomata, can be opened and closed by the plant. The opening and closing of the stomata is
controlled by an ingenious system that is influenced by many factors. The stomata are open if light is present and
the plant wants to absorb CO2 in order to produce sugars for the growth of the plant. The stomata close if too much
water evaporates, as a result of which the plant may dehydrate.