Greenhouse. According to Wikipedia, growing of vegetables in an environment similar to that of a greenhouse's existed as far back as the Roman times. However, the first modern greenhouses were built in Italy in the 13th century to house the exotic plants that explorers brought back from the tropics.
Basically, what greenhouses do is that they protect crops from too much heat or cold, shield plants from dust storms and blizzards, and help keep out pests. Light and temperature control allows greenhouses to turn inarable land into arable land, thereby improving food production in marginal environments. Many vegetables and flowers are grown in greenhouses in late winter and early spring, and then transplanted outside when weather conditions are more conducive for the plants.
If you are planning to set up a greenhouse, here is a site that can help you. Not only does Gothic Arch Greenhouses supply greenhouses and they do have many different types, Gothic Arch Greenhouses has a wide selection of Greenhouse Supplies to ensure your greenhouse operates at its optimal level for whatever crops and plants you are planting whether you are a backyard hobbyist or a commercial planter.
Gothic Arch Greenhouse is a family business and has been in the business for more than 65 years. With their exemplary customer service and their expertise, whether it's a greenhouse, greenhouse supplies or even Greenhouse Kits you need, I'm sure you will find it here at Gothic Arch Greenhouses. Happy planting!