The fall has been because many projects in residential areas have not abided by the plan on green cover development, lot of areas meant for tree planting have been used for other purposes.
Urbanization progress for the last 15 years has resulted in the disappearance of 47 canals with the total area of 16.4 hectares. In addition, 7.4 hectares of Binh Tien reservoir, one of the most important ones in the region, has been filled up.