Yellow garbage bags are used for disposing of waste that needs to be handled with caution. Types of waste include biohazard wastes, infectious waste, and hazardous material. Each of these bags needs to be handled with extreme care and needs to be clearly marked. Yellow colored trash bags represent a higher level of care and are to be handled accordingly. Not always will a facility be dealing with hazardous waste, sometimes they might be disposing broken glass and simply want the handler to be careful.