India's copper ore reserves have been estimated at 400 million tonnes, with a metal content of 5 million tones. The principal copper belt of India lies in Singhbhum and Hazaribagh in Jharkhand. The mining centres are located at Mosabani, Ghatsila, Thobani and Badia of Singbhbum, Hazaribagh of Bihar, the Khetri and Dariba areas of Rajasthan, and Agnigundala of Andhra Pradesh. Total production is 2.6 million tones.
6. The scarcity or crop failure of which of the following can cause a serious edible oil crisis in India?