116. There is yet another aspect of the matter, which requires consideration of this court. Indisputably, as the city grows, adequate open spaces, green spaces such as parks, woodlands and rolling country sides accessible to all the inhabitants must be reserved and preserved which by all means would contribute in large measure to quality of life, the citizens are entitled for and therefore, the population growth and migration to the city may necessitate modification in the planning but then, under the pressure of population growth and migration, the land use plan cannot be permitted to be changed in such a manner that it converts the city into just a cluster of buildings frustrating the very object of the planned development undertaken under the statutory scheme so as to ensure healthy and peaceful environment for the citizens. It needs to be emphasised that whenever modification of the Master Plan is undertaken so as to include the land forming part of the peripheral control belt within the scheme of urban development, the authorities entrusted with the duty to ensure the quality of life for the citizen through planned development, are under an obligation to take into consideration the requirement of the lung spaces for the existing population of the city and reserve the adequate land for that purpose in the close vicinity inasmuch as, if the urbanised area in the city go on expanding and the further inclusion of the surrounding villages is made within the urbanisable area, the lung spaces required for existing population in the close vicinity cannot be done away with or shifted to a remote place and therefore, whenever the modification, alteration or revision of the Master Development Plan is undertaken, the green spaces required for the existing population must be reserved by providing buffer zone. To put in other words, any development activity within the peripheral control belt for the purposes other than those specified under the peripheral control belt should not be permitted without ensuring the fulfillment of requirement of open spaces/green spaces for the existing population settled in different zones of the city.