Why we can't & shouldn't get rid of open spaces of city.

Holistic environmental economic view 

Open and Green Spaces have been integral part of the fabric of city historically and served as a democratic interaction place for citizens in the sea of individual private territories of a city. Though green landscape philosophy and clean ambient environment techniques have evolved and spread widely in course of time from open public realm to building interior, to terrace garden, to artificial air purifiers etc. but the material or psychological need of public open spaces in the city can not be replaced by any other present technology or method. So its not only the need of green spaces but the need of pubic space which validates the existence of such open and green spaces throughout the city and this need cannot always be evaluated on monetary terms. Government and municipal bodies  need to find out new innovative fiscal strategies to raise funds to operate and maintain such spaces rather than getting rid of green space for immediate economical benefit.