Compact fluorescent bulbs are efficient but raise environmental concerns mainly due to their mercury content and disposal issues. The presence of mercury poses risks if bulbs are broken or not recycled properly. Ensuring proper disposal through recycling programs is crucial to mitigate these environmental impacts. ;
The environmental concern raised about compact fluorescent bulbs is their mercury content and the associated disposal issues. Proper disposal is essential to prevent mercury pollution. Therefore, option B, 'mercury content and disposal', is the correct choice.
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