Name three typical greenhouse climate control components.

• A. Heating system, ventilation, and cooling system
• B. Lighting, irrigation, and shade cloth
• C. Benches, shelving, and drainage
• D. CO2 sensors only

Answer: (A)

Controlling a greenhouse climate means keeping temperature, humidity, and air exchange within target ranges, which relies on three primary types of equipment: a heating system to add warmth when it’s cold, ventilation to move air and regulate humidity and fresh air exchange, and a cooling system to reduce heat buildup. Together, these address the main environmental factors that affect plant growth inside a greenhouse.

Other items contribute to plant growth or microclimate, but they aren’t the active climate-control systems themselves. Lighting and shade cloth affect solar input and can influence temperature indirectly, but they’re not equipment that actively manages climate. Irrigation affects humidity and soil moisture but isn’t a climate-control device. Benches, shelving, and drainage support layout and water management, not climate control. CO2 sensors provide data and may support enrichment plans, but a sensor alone doesn’t constitute a climate-control system without mechanisms to adjust CO2 levels.