This is the 10493rd most frequent Spanish word.
convertía
"Convertía" means "was converting" or "used to convert" in English.
The verb 'convertía' here is used in the imperfect tense to indicate a gradual transformation or state during a past period.
Ella se convertía en una líder durante los eventos importantes.
She was becoming a leader during important events.
'Convertía' is used here to describe a repeated or ongoing action in the past where waste was transformed into energy.
El proyecto convertía los residuos en energía renovable.
The project was converting waste into renewable energy.
In this case, 'convertía' expresses the process of change or transformation happening in the past for the stories told.