Chemistry
Nylon threads are made of

Polysaccharide
Polyester polymer
Polyamide polymer
Polyvinyl polymer

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Chemistry
The open "Sigrees" or coal stoves often require fanning to sustain burning because of

Interrupted release of moisture from the material
Lack of oxygen in the surroundings of sigrees
Accumulation of smoke and dust over the sigrees
Tendency of carbon dioxide to form a layer along with dust smoke

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