A greenhouse is a structure used primarily for the cultivation of plants, typically for gardening or commercial purposes. Greenhouses are designed to create a controlled environment that maximizes plant growth by providing optimal light, heat, humidity, and ventilation. This enables plants to thrive in conditions that may not be suitable outdoors, allowing for year-round cultivation and protection from harsh weather conditions. Greenhouses are used for a variety of purposes, including growing vegetables, flowers, and ornamental plants, as well as conducting scientific research on plant biology and agriculture.