Environment & Ecology · Ozone Layer Depletion
निम्नलिखित में से किस प्रमुख ओजोन-क्षयकारी पदार्थ का उपयोग पारंपरिक रूप से अग्निशामक यंत्रों (Fire Extinguishers) में किया जाता था?
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हेलोन्स (Halons)
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