state gov UKPSC RO ARO Mock Tests Series 2025 General Knowledge Ecology and Environment

ଓଜନ୍ ହ୍ରାସର ମୁଖ୍ୟ କାରଣ ହେଉଛି |

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କାର୍ବନ ମନୋକ୍ସାଇଡ୍ 
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ଅଙ୍ଗାରକାମ୍ଳ
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ହାଇଡ୍ରୋ କାର୍ବନ୍ 
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କ୍ଲୋରୋଫ୍ଲୋରୋକାର୍ବନ୍ (CFCs)
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