Impoverished		A danger
Toxic		join pieces of metal using a specific process
Irreversible		relating to the anatomy, functions, and organic disorders of nerves and the nervous system
Neurological		Dangerous or harmful to people's health
Hazard		Describing something that cannot go back to the way it was before
Solder		not enough strength, vitality, or natural fertility
Obsolescence		the process of becoming obsolete or outdated and no longer used.