That the music being played in both places has not only changed the kids’ lives, but has a deep connection to…garbage.
Music that lives alongside garbage
Vicente Guerrero is located on the edge of a large landfill,  just 16 kilometers south of Oaxaca  — an old colonial city that's popular with tourists — but a world away from the nearby pre-Columbian ruins and its world famous cuisine. For some years now, La banda de música  (The music band) has played in the community. It's a project that has evolved into a symphony orchestra made up of children and adolescents, who have found a way to overcome the poverty surrounding them with their musical instruments:
Una escuela de música con 100 estudiantes se ha vuelto un eje central de la comunidad de Vicente Guerrero en Oaxaca https://t.co/gbQciibvcj 
— José Luis Moyano (@NicksNames) 23 de noviembre de 2016 
A music school with 100 students has become a focal point for the community of Vicente Guerrero in Oaxaca.
The British newspaper The Guardian  wrote about the project:
The community, in one of Mexico’s poorest states, has a reputation for drug abuse and gang violence. But it is undergoing a transformation after a fortuitous encounter with a French pilot helped launch a musical venture offering rare hope to its youth.
The young band members take  their commitment to the musical group very seriously, according to local media outlet Noticias Oaxaca NVI:
Ni bien salen de la escuela, llegan casi corriendo a sus casas, ni bien comen y se encaminan por las polvorientas calles para encontrarse con su gran pasión. Siempre llegan sonriendo, con los ojos vivaces y jugueteando, entre un gran bullicio. […] aprenden día a día a tocar con destreza la trompeta, el trombón, el flautín, el clarinete, el oboe, la flauta, la trompa, los timbales, los bongoes y las congas.
As soon as they get out of school, they almost run back to their homes; and as soon as they have lunch, they head through dusty roads to take up their grand passion. They always arrive smiling, with lively eyes, playing around, amidst hustle and bustle. […] They learn day by day to skilfully play the trumpet, the trombone, the piccolo, the clarinet, the oboe, the flute, the French horn, the kettleddrum, the bongos and the conga.
Garbage made into music
More than 7,000 kilometers south from Vicente Guerrero, the children of Cateura — a village practically located on top of the main landfill of Asunción, Paraguay's capital — play instruments made out of recycled materials :
[Interpretan] obras musicales con instrumentos reciclados, fabricados a partir de residuos sólidos domiciliarios, en el taller de lutería que posee el grupo en Cateura, donde recicladores, asesorados por Favio Chávez […], han comenzado a utilizar restos de “basura” para elaborar instrumentos que emitieran sonidos musicales. Los instrumentos […] imitan a violines, violas, cellos, contrabajos, guitarras, flautas, saxofones, trompetas, trombones e instrumentos de percusión, pero construidos con basura. Entre su repertorio ejecutan música clásica, música folklórica, música paraguaya, música latinoamericana, música de los Beatles, de Frank Sinatra, entre otros.
[They perform] musical pieces with recycled instruments, made from domestic solid waste, at the musical instrument workshop the group has in Cateura, where recyclers under the guidance of Favio Chávez […] have started to use “garbage” parts to fashion instruments that make musical sounds. The instruments […] imitate violins, violas, cellos, double basses, guitars, flutes, saxophones, trumpets, trombones and percussion instruments, all made out of garbage. Their repertoire includes classical music, folk music, Paraguayan and Latin American music, music by The Beatles, Frank Sinatra, among others.
In an article by US newspaper the Los Angeles Times, Favio Chávez, a local ecologist and musician who is teaching the children of Cateura to play, remembers their early days :
At first it was very difficult because we had no place to rehearse and we had to teach in the same place where the parents were working in the trash […]. The children knew nothing about music and it was very difficult to contact parents because many of them do not live with their children.
That all changed when Favio was shown something he had never seen before: a violin made out of garbage. Today, there is a whole orchestra of assembled instruments, called The Recycled Orchestra . A documentary called “Landfill Harmonic” chronicled the musical effort:
The world generates about a billion tons of garbage a year. Those who live with it and from it are the poor – like the people of Cateura, Paraguay. And here they are transforming it into beauty. Landfill Harmonic follows the orchestra as it takes its inspiring spectacle of trash-into-music around the world.
The orchestra  has even performed its music for Pope Francis:
The Orquesta de Instrumentos Reciclados Cateura were invited to play for Pope Francisco, and presented him with a… http://t.co/gPXweZrNqV 
— Landfill Harmonic (@landfillhrmnic) July 13, 2015 
These two groups, as well as some others , show that with music, the possibilities are endless.