A greenhouse helps in regulating temperature and maintaining conditions favorable for a specific crop that otherwise would not be ideal for the climate in that specific region. During the Roman era farmers used to grow cucumber plants in wheeled carts that would be kept in the sun during the day and brought inside to keep them warm at night. From those humble beginnings, greenhouses have come so far today that you can control every aspect related to plant growth. The transparent glass or poly-carbonate sheet traps heat from the sun and keeps your crop warm. LED s are shined on to the crop at desired levels to keep up the plant growth during the night. Pollinators can enter the green houses through vents that also help in regulating the temperature if it gets too hot. Computer controlled systems are put in place in some greenhouses to make keep things precise. Downsides of greenhouses are its initial set up cost and technical knowledge required. It is tough to scale up unlike farming on an open field. Lot of attention needs to be put in through every step of the process. Small mistakes can have you facing problems like pests, moisture problem leading to development of algae, tough time getting plants pollinated etc.
A greenhouse helps in regulating temperature and maintaining conditions favorable for a specific crop that otherwise would not be ideal for the climate in that specific region.