Now-a-days, roof top gardening is being popular for the urban citizens in Bangladesh. As open space is so little in the cities people who loves greens are being interested to it. A roof garden is any garden on the roof of a building. Besides the decorative benefit, roof plantings may provide food, temperature control, hydrological benefits, architectural enhancement, habitats or corridors for wildlife, and recreational opportunities.
Rooftop farming is usually done using green roof, hydroponics, aeroponics
or air dynaponics systems or container gardens. There are various environmental impact of roof top gardening. Roof gardens are the friends of urban environments and they assist to reduce the overall heat absorption of the building as well as reducing energy consumption. A study was performed by the University of Cardiff which shows that plant surfaces by transpiration process, do not rise more than 4-5° C above the ambient. This then translates into a cooling of the environment between 3.6 and 11.3 degrees Celsius (6.5 and 20.3 °F),depending on the area on earth.If widely adopted, rooftop gardens could reduce the urban heat island, which would decrease smog episodes, problems associated with heat stress and further lower energy consumption.
Gardening favors contacts and exchanges and betters the quality of life.For seniors, gardens stimulate social encounters, physical activity. It can mean getting back to the earth for some and participating in a lively project that comes with various therapeutic benefits. The community in contact with the garden will benefit from the feeling that comes from helping others, commitment to a project and
socializing with one another.
Roof top garden came up as a concept of relief to our urban lifestyle that taking place of our exhaustion to concreteness of our cities. In case of Public building, it can be facilitated by mandatory policy by the Government as some of the departments or autonomous organizations have the manpower of Gardener in the
organogram who can take care of it. Rooftop gardens could reduce the urban heat island, which would decrease smog episodes, problems associated with heat stress and further lower energy consumption.It reduces expenditure on purchase of fruits and vegetables. Effective utilization of space available at the roof top Supply of toxic free fruits and vegetables.