Taxpayers would pay tens of billions for Australia to meet targets under direct action policy.
Expert panel calls for urgent action on threats to the natural wonder.
Move is belated acknowledgement that, left alone, a market will not act in the national interest.
Tasmania could become a "battery for Australia" under a proposal to double the capacity of the country's largest hydro power scheme, Prime Minister Malcolm Turnbull has declared.
The wisdom of a campaign by the Turnbull government emphasising the risks of moving too rapidly to renewable energy has been thrown into question by polling that suggests a majority of its supporters don't agree.
The Greens are pushing for a new public authority to take responsibility for Australia's beleaguered electricity system out of politicians' hands.
Calls for an extraordinary government intervention to keep the ailing Hazelwood coal power plant open have been rejected by Prime Minister Malcolm Turnbull, who said its closure would not affect electricity security.
A leading national business group has called on Canberra and Victoria to consider an unprecedented "emergency intervention" to keep the Hazelwood coal power plant running.
What if the biggest government announcement in electricity generation in years was both a great breakthrough and a distraction?
So how did we get here?