The titles of her songs speak volumes: Wicked Men, Low Blow, Pure Pain and Hypocrite. Then there's her mega hit: Two-Legged Rat. Rife with tales of abusive husbands, impotent lovers and cheating boyfriends, these lyrics have made Francisca Viveros Barradas -- better known as Paquita la del Barrio -- much more than an artist. She has become a sociological phenomenon.

The illegal battery smelter so contaminated children here that some of them have been found with what are supposed to be fatal levels of lead in their blood. But they are alive -- many of them with eye problems, seizures, severe learning deficiencies and blank stares like Johan's.