Why do natural polymers not pose as much of an issue in landfills as synthetic polymers?

Natural polymers, such as cellulose and starch, can be broken down by microorganisms in the environment. Synthetic polymers, such as many plastics, generally do not biodegrade readily and can persist in landfills for a long time. Therefore, natural polymers pose less of a landfill problem because they are biodegradable; this is choice D.

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