Informal waste collection
Informal waste collection is the activity of "manually sorting and extracting various recyclable and reusable materials from mixed waste, at legal and illegal dumpsites, on top of or under piles of waste, in bins, at various transfer points, in transport trucks or elsewhere". When this activity is carried out in bins, the term "scavenging" is used.
Source: Wikipedia — Informal waste collection (CC BY-SA 4.0)