China, the world's largest coal miner and consumer, has reported six coal mine accidents since October.

Measured and indicated pit resources total 132 million tonnes, with an additional inferred resource of 500,000 tonnes.

Ethical investors plan to extend their campaign for miners and other big businesses to stop funding industry associations that block progress on UN goals to curb climate change.

For all the talk of ditching fossil fuels to fight climate change, coal remains king in much of the world.