Subsidies could be on offer to extend the lives of coal-fired power plants, while nuclear is likely to feature in the opposition's long-awaited climate and energy policy.

Political infighting within the coalition has intensified over the Liberals' commitment to a target of reaching net-zero emissions by 2050, a position the party is poised to follow junior partner the Nationals in dumping.

The Liberal Party's formal position on the climate target will be decided following meetings in Canberra mid-week.

But opposition energy spokesman Dan Tehan flagged subsidies could be offered to keep current coal-fired power plants operating for longer, while he also backed ramping up gas supplies.

"We need to make sure that we're sweating those coal assets ... and also that we can get more gas into

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