Answer :
Final answer:
Button-cell batteries in small devices may contain mercury and need proper disposal. Other listed automotive devices such as airbags, oxygen sensors, and spark plugs do not typically use mercury in their operation. Therefore the correct answer is: c
Explanation:
These button-cell batteries need to be disposed of properly at a hazardous waste facility due to the mercury content. Mercuric oxide button cells were formerly common in some applications, but due to the toxicity and environmental effects of mercury, they are no longer available. It's important to note that airbags, oxygen sensors, and spark plugs do not typically contain mercury. Instead, airbags operate via the rapid inflation from the decomposition of sodium azide, without the use of mercury.
However, due to environmental concerns and regulations, the use of mercury in automotive batteries has significantly declined in recent years, with many manufacturers transitioning to alternative battery technologies that are more environmentally friendly. Other automotive devices such as airbags, oxygen sensors, and spark plugs do not typically contain mercury.
