Основната цел на оранжерията е да осигури топла, влажна среда за растеж на растенията. However, if a greenhouse is completely sealed off, it can lead to a range of problems. The most significant issue is the drop in carbon dioxide (CO2) levels, which are essential for photosynthesis. Without sufficient CO2, plants will not be able to perform photosynthesis efficiently, slowing down their growth.