A greenhouse (also called a glasshouse, or, if with sufficient heating, a hothouse) is a structure with walls and roof made chiefly of transparent material, such as glass, in which plants requiring regulated climatic conditions are grown. These structures range in size from small sheds to industrial-sized buildings. A miniature greenhouse is known as a cold frame. The interior of a greenhouse exposed to sunlight becomes significantly warmer than the external ambient temperature, protecting its contents in cold weather. Many commercial glass greenhouses or hothouses are high tech production facilities for vegetables or flowers. The glass greenhouses are filled with equipment including screening installations, heating, cooling, lighting and may be controlled by a computer to optimize conditions for plant growth. Different techniques are then used to evaluate optimality-degrees and comfort ratio of greenhouse micro-climate in order to reduce production risk prior to cultivation of a specific crop.

The idea of growing plants in environmentally controlled areas has existed since Roman times.[3] The Roman emperor Tiberius ate a cucumber-like vegetable daily. The Roman gardeners used artificial methods (similar to the greenhouse system) of growing to have it available for his table every day of the year.

A greenhouse is a structure with walls and roof made chiefly of transparent material, such as glass, in which plants requiring regulated climatic conditions are grown.

A greenhouse is a structure with walls and roof made chiefly of transparent material, such as glass, in which plants requiring regulated climatic conditions are grown. These plants are kept within the building for use or study. Such a building serves as a means to protect vulnerable plants from weather conditions outside and to provide for plant growth under controlled conditions.

A greenhouse may be used to grow flowers and herbs, or to raise conditionally hardy plants such as cucumbers or tomatoes outside their natural range while avoiding some of the problems associated with open field cultivation such as weeds, insect pests, soil fertility considerations and seasonal extremes in temperature. Greenhouses also provide protection against certain diseases that affect any living organism which grows in the ground (e.g., gophers).

These structures range in size from small sheds to industrial-sized buildings.

Greenhouses can be heated by sunlight, or they can use electric heaters. Smaller greenhouses are often heated by the sun, while larger greenhouses require additional heat. Greenhouses may also include insulation in the form of glass panes.

A miniature greenhouse is known as a cold frame.

• Cold frames are a miniature greenhouse that can be used to start seedlings indoors.
• They’re usually made of glass, plastic or polycarbonate and placed in the sunniest window of your home.

The interior of a greenhouse exposed to sunlight becomes significantly warmer than the external ambient temperature, protecting its contents in cold weather.

The interior of a greenhouse exposed to sunlight becomes significantly warmer than the external ambient temperature, protecting its contents in cold weather. This is called the greenhouse effect and it can be demonstrated by placing a thermometer inside and outside a dark-coloured box.

Many commercial glass greenhouses or hothouses are high tech production facilities for vegetables or flowers.

Glass greenhouses are used for commercial production of vegetables and flowers. They can be used to grow plants in a controlled environment, but they can also be used to increase the amount of air and light that reaches plants, which makes growing them easier. They are especially useful for crops like tomatoes, which need lots of water during their growth period.

There are many different types of glass greenhouses. Some have only one wall made out of glass, while others have three walls consisting entirely or partially comprised of windows that let in natural sunlight. Many commercial glass greenhouses or hothouses are high-tech production facilities for vegetables or flowers; these facilities may include artificial lighting systems so that workers can work at night as well as during daylight hours.

The glass greenhouses are filled with equipment including screening installations, heating, cooling, lighting and may be controlled by a computer to optimize conditions for plant growth.

Different techniques are then used to evaluate optimality-degrees and comfort ratio of greenhouse micro-climate in order to reduce production risk prior to cultivation of a specific crop.

The idea of growing plants in environmentally controlled areas has existed since Roman times. The Roman emperor Tiberius ate a cucumber-like vegetable daily, as did other members of the aristocracy. This vegetable was cultivated using artificial methods (similar to the greenhouse system) of growing that enabled it to be available for his table every day of the year.

The Romans also used these techniques to grow fruits and vegetables at higher altitudes, enabling them to enjoy fresh produce during colder seasons when such food would otherwise not be available locally.

The idea of growing plants in environmentally controlled areas has existed since Roman times.

The idea of growing plants in environmentally controlled areas has existed since Roman times. The Roman emperor Tiberius ate a cucumber-like vegetable daily, and Roman gardeners used artificial methods (similar to the greenhouse system) of growing to have it available for his table every day of the year.

The earliest greenhouses were created by wealthy Europeans who wanted fresh flowers year-round.