Mining executive-turned board nominee Ian Dunlop will tell BHP Billiton's shareholders this week that the company is headed for oblivion unless it acts on climate change.

Mr Dunlop faces an uphill battle in becoming the 14th member of a board that recommended against his election.  He will tell BHP’s AGM in Perth on Thursday that the world’s biggest miner should stop or greatly reduce much of what it is doing: mining and drilling fossil fuels such…