What is one way to prevent temperature from becoming a limiting factor in greenhouses during the summer?

Using ventilation is an effective method to prevent temperature from becoming a limiting factor in greenhouses during the summer. High temperatures can adversely affect plant growth and productivity by causing stress, affecting photosynthesis, and leading to increased water loss. Ventilation helps to regulate temperature by allowing hot air to escape and cooler air to enter the greenhouse, maintaining an optimal environment for plant growth.

In contrast, introducing more plants could increase competition for resources and potentially create overcrowding, which may not help manage temperatures effectively. Increasing soil moisture is also important for plant health, but it does not directly address the issue of high air temperatures within the greenhouse. Reducing light intensity can negatively affect photosynthesis, which is crucial for plant growth, particularly in summer when sunlight is abundant. Therefore, proper ventilation stands out as the optimal solution to regulate greenhouse temperature.