lets talk waste.

Waste is used to describe:
materials not needed after primary production:
the unwanted byproduct of a process:
Products no longer needed:
Objects that are now defunct:

Examples include municipal solid waste (household trash/refuse), hazardous waste, wastewater (such as sewage, which contains bodily wastes (feces and urine) and surface runoff), radioactive waste, and others.

Waste is often considered worthless but this is usually not the case. It very much depends on the type of waste. And the waste disposal system favoured.

Read about disposing of plastic here.