Question

Why is -waste harmful? Express your opinion about this.

Answer 1

Answer:

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"Harmful chemical substance" means a solid, liquid, or gas that through its chemical or physical properties, along or in combination with one or more other chemical substances, can be used to cause death, injury or disease in humans, animals or plants.

Answer 2

Answer:

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.