The gas that most commonly accumulates in poorly ventilated buildings is radon, a radioactive gas that seeps from the ground and is trapped inside. Another gas, carbon monoxide (CO), can also accumulate from incomplete combustion in poorly ventilated areas.
Which gas can be accumulated in poorly ventilated buildings?
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This question is part of 📚 General Knowledge within the broader 🌐 Current Affairs & GK subject and appears in the PPSC Punjab Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.