In previous years when reserves dipped below the 60 - day mark, the supply was able to recover. But now Worldwatch is unsure of the earth’s ability to regain its losses.
पिछले सालों में जब गिरावट हुई तब ६० - दिन के लिए वह पर्याप्त था, और कमी की आपूर्ति हो सकी ।