While his former party works to combat the threat growing Greens support poses to Labor's chances in Griffith and Brisbane, state MP Rob Pyne has publicly endorsed a Greens candidate in his electorate warning the "duopoly should be worried".

The former Labor turned independent MP has spoken out against Queensland Labor's continued support of Queensland's mining industry since leaving the party, and while he has committed to vote with his former parliamentary colleagues on matters of "true labour values", he has deviated from the party on environmental issues.

He said that is one of the main reasons he has thrown his support behind Kurt Pudniks, The Greens candidate for the seat of Leichhardt, currently held by the Coalition's Warren Entsch, where Labor believes Sharryn Howes has a chance of nabbing the seat herself.

"Cairns is a town in desperate need of attention, and prioritisation, in the federal policy arena," Mr Pyne said.