The strategic assessment will include, environmental and health impacts of thermal coal mining and market analysis of projected demand for thermal coal.

The company plans to replace its fleet of diesel trucks with five electric mine haul trucks made by Komatsu at its Wolverine mine.

The perception of sustainability as a nice-to-have but costly luxury has changed irrevocably in the past 18 months.

Teck wants approval for its C$20.6 billion ($15.5 billion) Frontier project, which involves an open pit mine to eventually produce 260,000 barrels per day.

BHP is considering its membership of four industry associations due to concerns about their climate and energy policies.

South Africa's biggest money manager has written to 22 gold mining companies asking them to disclose data on the emissions they cause.