"Natural ecosystems provide an array of basic processes that affect and support humans."

Which statement does not support this quotation?

a
Lichens and mosses living on rocks help to break the rocks down, forming soil.
b
Bacterial decay helps recycle matter.
c
Trees add to the amount of atmospheric oxygen.
d
Treated sewage is less damaging to the environment than untreated sewage.

1 answer

d
Treated sewage is less damaging to the environment than untreated sewage.
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