“…Materials representing natural plant waste such as banana peel, cocoa beans shells, rice powder, palm kernel fibre, coconut fibre, wood powder, cow bone, crab shells, hazelnut shells, corn husks and walnut shells are often used and proposed. [97][98][99][100][101][102][103][104][105][106][107] According to Arman et al, 108 brake pads with additives of agricultural materials, that is waste are useful because they do not have an impact on the environment and health and show the same properties as metal brake pads. According to this source, a certain percentage of phenolic resin with the addition of banana peel has good tribological characteristics, but the ratio must be taken into account, bearing in mind that otherwise, excessive wear occurs.…”