Don't be a climate coward PM: Greens

The Greens have warned Malcolm Turnbull not to be a "climate coward" at global talks in Paris.

The prime minister had one last chance to prove he was not a weathervane on climate change like his predecessor Tony Abbott, Greens MP Adam Bandt told reporters in Canberra on Tuesday.

"He's going to Paris with a big black rock around his neck," he said, citing the government's approval of the southern hemisphere's biggest coal mine Adani Carmichael.