While I agree with the thrust of your comment, it must be pointed out that greens in general believe
1) Nuclear power is much too dangerous and the waste problem will kill us all. Therefore it has no place on a green grid
2) Hydro requires dams which will (a) flood wilderness areas inhabited by endangered species and (b) regulate the downstream flow, removing the 'natural' flooding and drought, again endangering the ecology.
So, while it makes sense to use nuclear and hydro, all the while the Australian government is in the pocket of the Watermelon party (green on the outside, red in the middle) it will never happen.