Answers

  • Brainly User
2015-06-03T21:33:04+05:30
This is because the enzymes and bacteria that decomposes waste can only break down natural substance into simpler and non-harmful substance...They cant break down man made or factory made items into simpler items.
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2015-06-04T11:59:04+05:30
Some substances are biodegradable while some are not because the bacteria cannot break it down and mix it with the soil and they are also not naturally obtained .
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