He was the first elected representative for the Greens in Australia, and helped build the party into the force it is today.

But Bob Brown's actions have never been limited to the halls of power.

From the campaign to stop the Franklin dam, to his protests against logging, Brown has been arrested multiple times for standing up for his beliefs, and its that conviction that's helped to create enduring movements.

A new film, The Giants, not only looks at Brown's life, but in parallel, the magical ecosystems he's dedicated that life to protecting.