Answer: The correct option is: produce particulate matter that may contribute to smog.
Explanation: Incinerators burn waste, which produces particulate matter that can contribute to smog, a type of air pollution. Landfills, on the other hand, release methane and other greenhouse gases, which can contribute to climate change. While incineration can produce energy in the form of electricity or heat, it is not the most efficient method, and the particulate matter and toxic emissions that it produces are a significant environmental and health concern.