engineering recuitment MPPGCL JE 2024 Mock Test General Knowledge Ecology and Environment Conservation efforts: India and World

ओजोन परत के क्षरण का पता सर्वप्रथम किसने लगाया था?

1
डाबसन 
2
रिचर्ड एम्डसन 
3
जोसेफ फारमैन 
4
चार्ल्स हेनरी 
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