Senator McDONALD (Queensland—Deputy Leader of the Nationals in the Senate) (14:53): Minister, since we signed up to net zero, energy prices have skyrocketed nearly 40 per cent, and gas prices are up 46 per cent. Minister, have you modelled how much higher energy prices will have to be to reach net zero compared to not doing net zero? If so, how much higher will energy and gas prices have to be to reach net zero?