Why is uniform CO2 distribution and proper ventilation important in a greenhouse?

• A. To minimize water usage
• B. To boost photosynthesis and yields while keeping worker exposure within safety limits
• C. To prevent nutrient leaching
• D. To reduce pest populations

Answer: (B)

Uniform distribution of CO2 and good ventilation are essential because they directly affect how effectively plants can use the added carbon dioxide and how safely the workspace operates. When CO2 is spread evenly, every part of the canopy has access to enriched air, so photosynthesis can increase across the whole plant stand, leading to faster growth and higher yields under the right light conditions. Proper ventilation serves two critical roles: it prevents dangerous buildup of CO2 in occupied spaces, protecting workers, and it maintains stable air temperature and humidity, which supports consistent gas exchange in the leaves and reduces disease pressure. The combination ensures you gain the growth benefits of higher CO2 without creating hotspots or creating unsafe working conditions. Other options don’t tie directly to how CO2 distribution and air exchange influence plant growth and worker safety.