Senator ROBERTS (Queensland) (14:34): A modern coal-fired power station is expected to last 60 years. Solar panels and wind turbines are expected to last 12 to 15 years—at most, 20. Over the 60-year life of a coal-fired power plant, the combination of wind and solar cobbled together to replace a single coal plant will need to be replaced four times. Minister, when will Labor release its system cost of the 2050 grid system?