railway RPF Constable Mock Test Series 2024 General Knowledge Ecology and Environment Environment Problems

खालीलपैकी कोणता हरितगृह वायू नाही?

1
पाण्याची वाफ
2
ओझोनच्या पृष्ठभागाची पातळी
3
नायट्रस ऑक्साईड
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हेलियम
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