engineering recuitment Haryana CET (HSSC) JE Civil 2023 Mock Test People Development & Environment Environmental Issues Ozone Layer Depletion

सीएफसी क्लोरोफ्लोरोकार्बन मुख्य रूप से जिम्मेदार है:

1
ओजोन ह्रास
2
ग्रीनहाउस प्रभाव
3
अम्ल वर्षा
4
धुंध
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