air pollution 10 architectural designs 9 air cleanness monitoring 8 history 6 architecture 5 rebuildings 5 front walls 4 more ... reconstruction 4 technological institutes 4 architectural composition 3 architectural details 3 children 3 imissions 3 ancient monuments 3 dust particles 3 roofs 3 mining engineering 3 health harmful substances 3 iron-concrete constructions 3 office buildings 2 architectural competitions 2 concrete constructions 2 demography 2 transport infrastructure 2 transport constructions 2 issues 2 deep wells 2 airports 2 facing structures 2 dwelling houses 2 less ...