A Greenhouse is a garden building designed to provide a sheltered environment for growing and cultivating plants. The exterior of the structure is made from transparent materials, such as polycarbonate plastic, which lets in sunlight and traps heat indoors to create a controlled growing environment. A form of ventilation is usually built into the structure to allow air circulation and prevent build ups of hot air.
This environment allows plants to be grown and maintained for longer throughout the year, while eliminating the risk of environmental damage caused by strong winds or rain. Greenhouses themselves come in a variety of shapes and sizes, with different sizes, frames, and glazing materials available.