Teaching Odisha LTR Teacher Mock Test Series 2024-25 General Knowledge Ecology and Environment Conservation efforts: India and World

ପରବର୍ତ୍ତୀ ବର୍ଷ କେଉଁ ସମୟରେ ଜଳ (ପ୍ରଦୂଷଣ ରୋକିବା ଏବଂ ନିୟନ୍ତ୍ରଣ) ଆଇନ କେବେ ପ୍ରଣୟନ ହେଲା?

1
1976
2
1977
3
1974
4
1975
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