Q. Sabse Pehle “ Paristhitiki Tantra ” Shabd Ka Prayog Kisne Kiya Tha ? Q. सबसे पहले “पारिस्थितिकी तंत्र” शब्द का प्रयोग किसने किया था ?

Q. सबसे पहले “पारिस्थितिकी तंत्र” शब्द का प्रयोग किसने किया था ?

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