Greens warn Labor not to do clean energy deal that protects coal power

Opposition told to be wary of doing a Finkel review deal with the Coalition that would prolong the life of coal plants

The Greens are attempting to warn Labor off doing a deal with the Turnbull government on a new clean energy target, saying a Finkel handshake could trigger a "valley of death" for short-term investment in renewables, and lock in coal, rather than stranding it.

With parliament due to resume on Monday, and with the Turnbull government inching closer to finally resolving and outlining its energy policy, the Greens climate change spokesman, Adam Bandt, will bring forward a bill to prolong and expand the existing renewable energy target scheme.