A compromise climate policy being mulled by the Liberals would put Australia in breach of its international obligations and risk legal consequences, experts say.

Ahead of a crucial meeting of Liberal MPs and senators on Wednesday, party insiders say they're likely to agree to water down Australia's climate ambition if they return to government while retaining a commitment to reaching net zero carbon emissions at some point.

Australia signed up to the Paris accord in 2015 under then-prime minister Tony Abbott, promising to limit its greenhouse gas emissions as part of a global push to tackle global warming.

Six years later, the Morrison government set a target of net zero emissions by 2050, and Labor has since set more ambitious climate goals including a 62 to 70 per cent reduction in ca

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