Some artificial products are also biodegradable because they are similar enough to plant and animal matter that they can be put to use by microorganisms. Some biodegradable items include orange peels, apple cores, banana peels, carrots, wood, bones, paper, and animal defecation. However, things like cups, forks, spoons, and bags are being produced to be biodegradable. This is a picture of an orange at my school, which is biodegradable.
References:
http://toxics.usgs.gov/definitions/biodegradation…
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