Given the scale of its contribution to global heating, the world’s biggest miner has a duty to invest heavily in solutions that could have a global impact Revealed: the internal BHP memo that slammed the brakes on world’s biggest miner’s climate push Read more from the BHP files investigation here Sign up for Adam Morton’s free Clear Air newsletter here If you have something to share about this story, you can contact Guardian Australia’s news teams using one of the following methods: The