asbestos-cement boiler room pipe, supported by system of metal extensions, with observation platform at top and ladder of brackets

asbestos asbestoscement atmosphere below blue boiler brackets cement chimney clouds cloudy combustion communication composite distance divert draft ecology emissions energy engineering environment equipment extensions flue heat house industrial installed ladder metal observation pipe platform power pylon rising room round sky stairs supply support supported system technology top tower transmission tripwires upper vertical vertically view wire nirrus