Step 1: Recalling the Text:
The essay frames the bangle-makers' suffering as generational bonded labour hidden from law and welfare.
Step 2: Listing the Hazards:
Beyond the physical dangers of furnace heat, glass injuries and eye damage, the essay also highlights the social hazard of children being denied education and trapped for life in this hazardous, poorly-paid trade due to caste and poverty.
Final Answer:
Glass bangle workers in Firozabad face constant physical danger — furnace heat that damages eyesight, glass shards causing cuts, and fume inhalation causing lung disease — all without safety equipment or legal protection, while poverty and social bondage trap entire families, including children, in this hazardous trade generation after generation.