From today's Age letter pages:

Last Sunday, at Australia's most polluting coal fired power station, 300 Victorians gathered to show how the community want Australia's energy to be made.
Outside Hazelwood Power Station in Victoria's Latrobe Valley, at "Switch Off Hazelwood, Switch On Renewables" we held over 170 reflective cardboard "mirrors", focussed on a cardboard tower, to create Australia's first symbolic solar thermal power station.