Since Argentina's 2001 economic crisis, thousands of workers excluded from the formal labour market have taken to the streets, collecting cardboard and materials to sell to recycling centres — a practice known as cartoneo.
To support this movement, the Sarmiento, Mitre and San Martin railway lines launched the "Tren blanco": stripped-down trains chartered to carry callejeros and their giant carros from working-class districts to the commercial areas generating the most waste. When these trains closed in 2006, cartoneros organised — forming a federation (FACCYR), a union (UTEP), and cooperatives like the MTE (18,000+ workers) — establishing centros de reciclados across the country as intermediaries with buyers.
On 10th December 2023, president Javier Milei's deregulation of imports caused cardboard prices to collapse by 50% in a single month, pushing the more than 150,000 cartoneros deeper into precarity.