Several states, including Massachusetts and Rhode Island, have developed ambitious renewable energy targets that hinge in large part on getting their power from turbines stationed in the water.
By rebranding coal as 'dispatchable', the government's National Energy Guarantee looks set to preserve demand for coal-fired power by giving it a new role – one it's not well equipped to fulfil.
Politics podcast: Tim Nelson on what to do with Liddell.
AGL chief economist Tim Nelson says preserving the Liddell power station may not be the best solution.
Michelle Grattan speaks to Deep Saini about the week in Australian politics.