Which of the following can be considered hazardous waste?

Triple-rinsed pesticide containers can indeed be considered hazardous waste due to the residues that may remain after the initial use. Although they undergo a rinsing process that significantly reduces any remaining pesticide, these containers can still pose a risk to human health and the environment if not disposed of properly. Pesticides contain active ingredients that can be toxic to both humans and various forms of wildlife, and even small amounts left behind can leach into soil or water sources.

In the context of waste management, hazardous waste is defined based on its potential to be harmful due to its chemical composition. Triple-rinsed containers, depending on the pesticides previously contained within them, can retain enough product to merit special handling and disposal protocols to mitigate any risk associated with their disposal.

Other options, such as compost from untreated plant materials, food waste from a kitchen, and diluted household cleaners, do not generally contain hazardous substances or pose a significant risk when discarded. Composting treated plant materials is a common practice in waste management, food waste can be composted or disposed of without significant environmental impact, and diluted household cleaners are typically safe in the concentrations they're used.