1. Tidal power

    A big idea by: Mark Postle

    Tidal power is constant bar the changing of the tides, Australia is surrounded by ocean and the vast majority of the population live close to the coast.

  2. Halve the worlds population

    A big idea by: Trish Burgoyne

    Our planet is already unsustainably overcrowded. In order to save it from further, irredeemable destruction, strict global birth control needs to be introduced and enforced. For this we need a world governing body that has the power to do that.