Sasol said to plan sale of its South Africa coal mining unit

A 40 to 60 per cent increase in productivity.

Mixed picture.

Markets are attempting to establish a trough.

Chilean company Mineria Activa is stepping up efforts to grab some of that market in a much greener way than China,

They shed $156 billion in market value last year, or about 16% of their combined worth, according to PwC.

Some of the world's top oil producers have decided to abandon coal and focus instead on ramping up production and trading of liquified natural gas as a cleaner fossil fuel alternative.

The dramatic fall was led mainly by the iron ore and coal sectors.

The World Coal Association's chairman and Glencore executive, Mick Buffier, has called governments to increase investment in low emission technologies.

China continues to ratchet down.