Question

what is waste?
explain in short​

Answer 1

Waste are unwanted or unusable materials. Waste is any substance which is 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.

hope it helps.

Answer 2

Answer:

to use or spend something in a careless way or for something that is not necessary

Explanation:

Waste 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.

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