The process of removing metals from rocks through melting is _____.

Materials that are _____ can be broken down by organisms.

_____ is a type of waste management that reduces the amount of waste generated.

In a(n) ____, garbage is dumped without environmental controls.

A(n) _____ is a site created for disposing of solid waste on land.

The _____ is the flow of waste through society.

The natural breakdown of organic matter is called _____.

The waste from making iron or other metals is called _____.

Which of the following means "human-made"?

Waste that is _____ eats away materials by chemical action.

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