SCIENCE BLOG. YEAR 4
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SCIENCE 4ยบ
UNIT 1
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Wednesday, 27 November 2013
PROTECTING ECOSYSTEMS: ECOSYSTEMS DETERIORATE
Living things in an ecosystem interact with each other.
An ecosystem deteriorates.
This can have serious effects on other living things.
Ecosystems deteriorate because of
pollution
,
deforestation
and
overexploitation
.
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