Which of the following statements does not support the idea of a natural ecosystem that affects humans?
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Bacteria of decay help recycle materials; Trees add to the amount of atmospheric oxygen; Treated sewage is less damaging to the environment than untreated sewage; Lichens and mosses living on rocks help to break the rocks down, forming soil.
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Stack trace:
#0 /var/www/web/proprofsdiscuss.com/SSI/function_live.php(661): array_slice()
#1 /var/www/web/proprofsdiscuss.com/SSI/function_live.php(3592): related_popular_ques()
#2 /var/www/web/proprofsdiscuss.com/question.php(1147): get_related_qsn()
#3 {main}
thrown in /var/www/web/proprofsdiscuss.com/SSI/function_live.php on line 661