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Environmental Changes

Across
To stay alive
When the environment is contaminated, or dirtied, by wast, chemicals and other harmful substances.
Actions by one thing that have an effect on a different or separate thing.
A place where an animal or plant lives.
The space and all living and nonliving things around an organism.
Down
All members of a species in a single area.
Something valuable that we can use.
When one or more organisms bring new organisms of the same type into existence.
To make or become different.