Tete in Mozambique has proved to be quite unlucky for the world’s biggest coal miner and India’s most prized public sector undertaking, Coal India. About six years ago, the PSU had won a five-year licence for exploration and development in the north-western province of the African nation. After spending over ₹500 crore for exploration in the past few years, more than two-thirds of the 224 sq km leasehold mined was a futile exercise in moving mud. As a result, Coal India Africana, a 100% subsidiary, will now retain just 54 sq km of land and relinquish the rest.