The clock is ticking for the federal government to pass a key election promise to reduce emissions, but negotiations are still under way to get it over the line.
The lower house is set to vote on the government's proposed changes to the existing safeguard mechanism, with an aim to pass the bill through parliament by the end of the sitting fortnight.
Proposed changes to the mechanism would apply to the country's 215 biggest polluters and force them to reduce their emissions by almost five per cent a year until 2030.
Companies not able to meet the targets would be forced to buy carbon credits to offset their emissions.
But the government is yet to secure the support needed to pass the changes through the Senate, after the coalition said it would not back the plan.
Tasmanian Liberal MP Bridget Archer indicated she might go against her party and support the mechanism, despite her concerns about the changes.
She said long-standing arguments about climate change were not useful to the parliament.
"I don't think it's helpful, and it is something that even within the political environment both major parties have accepted that emissions reduction target," Ms Archer told ABC Radio.
"We've accepted that we're working towards a net-zero by 2060 position, so let's talk about how we're going to achieve that, let's get on and do that."
She said the agreements between the government and opposition on referendum reform showed there was a path forward for the parties to work constructively.
"The balance of power in the Senate may be held by the Greens and others,'' Ms Archer said.
"It also could be held by the coalition ... and we've seen even this week in terms of the negotiation that's happened in the referendum machinery bill.
"It is possible to get negotiated outcomes between the major parties as well."
The backbencher said she would watch the Senate closely for the amendments and consider her voting position.
The Greens want the government to make a commitment to stop opening new coal and gas mines in exchange for their support for the mechanism.
Greens leader Adam Bandt said there was still time to get the details of the mechanism right.
"Taking action on climate means dealing with the question of coal and gas, not just saying it can all be offset, but actually ensuring that pollution in this country does not go up," he said.
"We are prepared to work with the government to develop a scheme that actually sees pollution go down."
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