What is an unwanted change in the environment caused by substances, such as wastes, or forms of energy, such as radiation.

These includes wastes that can catch fire, eat through metal, explode, or make people sick.

This is an example of high-powered wastes.

This can be replaced at the same rate at which it is being used.

This cannot be replaced or can only be replaced over thousands or millions of years.

An organism that makes a home for itself in a new place outside its native home.

When the number of individuals becomes so large that the individuals can’t get the resources they need to survive.

Where an organism lives is called this.

The clearing of forests is known as this.

The number and variety of organisms in an area.

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