Urja ke Anya Vikalp ki avashyakta kyon mahsus ki ja rahi hai
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Urja ke anya vikalp ki avashyakta isliye mahsus ki ja rahi hai kyonki petroleum urja simit hai aur kabhi bhi samapt ho sakta hai aur manushyon ko jivan vyatit karne ke kiye urja ki avashyakta hoti hai. Isi wajah se vaigyanik prakritik urja par research kar rahe hai.
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