uneconomical, wasteful (adj)

inefficient in use of time and effort and materials

"a clumsy and wasteful process"; "wasteful duplication of effort"; "uneconomical ebb and flow of power"

wasteful (adj)

tending to squander and waste

wasteful (adj)

laying waste

"when wasteful war shall statues overturn"- Shakespeare

wasteful

Waste (or wastes) are unwanted or unusable materials. Waste is any substance discarded after primary use, or is worthless, defective and of no use. A by-product, by contrast is a joint product of relatively minor economic value. A waste product may become a by-product, joint product or resource through an invention that raises a waste product's value above zero. 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.