Australian tech billionaire Mike Cannon-Brookes has made a multibillion-dollar bid to buy energy company AGL – Australia’s biggest greenhouse gas emitter – and speed up its exit from coal. In response, prime minister Scott Morrison and AGL executives have warned this plan could raise electricity prices and cost jobs. Laura Murphy-Oates speaks to Guardian Australia’s climate and environment editor Adam Morton about this historic bid and what it says about Australia’s lack of planning for a cleaner future