Russian researchers found that adding copper salts to coal reduces the content of unburnt carbon in ash residue by 3.1 times and CO content by 40%.

Firm resumed dividend and flagged possible further payouts on the back of strong commodity prices .

The world's no. 1 miner rewarded investors with a record $5.1bn first-half dividend and forecasted a “very constructive” outlook for the commodities market fundamentals.

Any new Bitcoin generated after the cryptocurrency’s Elon Musk-aided surge toward $50,000 is likely to be sourced using cheap coal power in China’s Xinjiang.