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|
|
1
|
a species dying out
|
|
7
|
the study of how living and nonliving things interact
|
|
8
|
processing waste items so the materials they are made of can be used to make new items
|
|
9
|
a gas high in Earth's atmosphere that blocks some of the harmful radiation from the sun
|
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10
|
all the living and nonliving things that interact with each other in an enviornment
|
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11
|
the act of producing or sending out something
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12
|
something that can be replaced in a person's lifetime
|
|
13
|
the air that surrounds Earth
|
|
16
|
something that is renwable
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|
19
|
anything in the ecosystem that can harm living things or damage natural resources
|
|
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