The new crossbench is set to play a key role in what could be a hung parliament, with independents fighting for climate action gearing up for a tough battle and far from united in their demands from the new government.

Independent Zali Steggall, who defeated former prime minister Tony Abbott in the Sydney seat of Warringah, has signalled that she will be squarely focused on climate change.

Independent candidate for Warringah Zali Steggall has vowed to be "a climate leader". Credit:Dylan Coker

"I will be a climate leader for you," Ms Steggall told a jubilant crowd at her election night party in Sydney.

"And I will keep the new government to account, and make sure we take action on climate change."