Urban Greening

Reforestation in the broadest sense is all the power to restore, maintain and improve land conditions in order to produce and function optimally, both their function as water or environmental protection. There is also a saying that the greening of the city is an effort to green the city by implementing the management of city parks, neighborhood parks, green lines and so on. In this urban greening is an open space-filling activities in the urban areas. In the process of photosynthesis of green plants take CO2 and took the role of C6H12O6 and O2 are desperately needed living things. Therefore, the role of green plants are needed to capture the CO2 and release O2 back into the air. In addition, various metabolic processes of green plants can provide various functions for the needs of living things that can improve environmental quality.

Every year the plants in this mempersenyawakan earth approximately 150,000 million tons of CO2 and 25,000 million tons of hydrogen to release 400,000 million tons of oxygen into the atmosphere, and to produce 450,000 million tonnes of organic substances. Every hour 1 ha green leaves absorbs 8 kg of CO2 is equivalent to the CO2 exhaled by the human breath approximately 200 people in the same time. Each tree planted by the air cooling capacity equal to the average of 5 air conditioning (AC), which operated continuously 20 hours a day. Each 93 m2 of trees able to absorb noise by 8 decibels, and every 1 ha of trees able to neutralize the CO2 released 20 vehicles.

Once the importance of the role of plants in the world in tackling the environmental crisis, especially in urban areas, very precise if the existence of plants to get serious attention in the implementation of urban greening as an element of urban forest.

Greening role and function (1) As the lungs of the city. As an element of green plants, the growth of acid producing substances (O2) which is indispensable for living creatures for respiration, (2) As an environmental regulator (micro), vegetation will cause local environmental air into cool, comfortable and fresh; (3) environmental Creator life (ecological); (4) balancing nature (adaphis) is the establishment of places of natural life for the animals that live in the vicinity; (5) Protection (protective), the physical condition of the surrounding natural (wind, sun, gases or dust -dust); (6) beauty (aesthetics); (7) Health (Hygiene); (8) Recreation and education (educational); (9) Social and economic policy.

The selection of plants for planting to grow well should consider the terms of horticulture (ecological) and physical conditions. Horticultural requirements of the response and tolerance to temperature, water needs, the needs and tolerance for sunlight, soil needs, pests and diseases, and physical conditions other that is greening purposes, cultivation requirements, canopy shape, color, aroma.