The major environmental problem with most addition polymers is that they
- A. dissolve in rainwater and pollute rivers
- B. react violently with air
- C. are non biodegradable, because their inert carbon backbone resists attack by microorganisms
- D. release oxygen as they age
Explanation
The saturated carbon chain has no polar groups for enzymes to attack, so plastic waste persists in landfill and in the oceans for centuries. Burning it disposes of the material but can release toxic gases, PVC giving hydrogen chloride and dioxins. Research into biodegradable and photodegradable polymers, and improved recycling of thermoplastics, addresses this directly.
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