1.   Here we will recover over one million tonnes of coal, partially by washing, and get rid of a major eyesore left by deep mining.

2.   Deep mining, they add, will eventually go global.

3.   Despite such stumbles, the Japanese are pressing ahead to perfect Kaiko and other gear, including prototype machines for deep mining.

4.   The concentrations were much greater than those of the manganese nodules that litter the global seabed and first prompted dreams of deep mining.