Anglo American Plc attempted to sell all its coal assets during its abortive restructuring in 2016, but gave up because no one was willing to buy them at a price it found acceptable. Rio Tinto Group got rid of its last coal mines (to Glencore, no less) last year. BHP Group seems committed to its huge mines producing steelmaking coal, but appears less attached to the ones producing the thermal coal used in power generation. What's changed? One factor is surely that major investors are increasingly putting pressure on companies to back away from the dirtiest emissions. Those that are still invested are increasingly likely to buck management on climate-related shareholder resolutions. Glencore's move follows "engagement with investor signatories of the Climate Action 100+ initiative", the company said in a statement on Wednesday. "We must invest in assets that will be resilient to regulatory, physical and operational risks related to climate change."