Congestion, housing The population density When the space is filled with buildings and utilities with air pollution and noise and dust problems. Are undermining the health of the people living in the city, both directly and indirectly the urban areas of the environment,no contributing to a lifestyle of another kind. The green space in the city is not enough to meet the needs of the people. And not conducive to leverage effect in many areas. In particular, environmental and public health. The World Health Organization determined that the capital should have a green area of 9 square meters per person. Currently, Thailand has only three square meters per person.