I) Whenever a town or city grows in size, there are certain requirements which need to be met. II) These are the responsibility of the Planning Commissions, which supervise all developments. III) For example, in Britain they make sure that parks and green areas are built every 500 metres. IV) Many citizens have complained that they do not have sufficient control over the manner in which their environment is altered. V) This is done so that the area does not become too urbanised and stifled by construction.