In the past most of the countries carried out the chimney cleaning by hiring sweeping apprentices bought from workhouse or orphans who are to be trained for the purpose.
In countries like Italy, Belgium and United Kingdom this system was famous. The kids used to climb narrow chimneys of 81 square inches which used to make them injured struck in those chimneys.
These boys or girls are prone to cancer by inhaling the carcinogenic soot of the chimneys. But soon the parliamentary Acts passed laws forbidding this kind chimney cleaning.
Chimney Sweep Torrington, CT