Scotland is set to scrap its target of reducing greenhouse gas emissions by 75 per cent by 2030.
Figures suggest that the government has missed eight of the last 12 annual targets, as ministers are told that reaching the milestone "is unachievable".
It is believed that goal of reaching "net-zero" by 2045 will remain.
First Minister Humza Yousaf is expected to make a statement at Holyrood on Thursday afternoon, the BBC reports.
Scotland is set to scrap its target of reducing greenhouse gas emissions by 75 per cent by 2030PAIndependent advisory group, The Climate Change Committee (CCC) warned Scotland in 2022 that it had lost its lead over the rest of the UK in tackling the issue.
In March, the group said that its 2030 target was "unreachable".
Scotland's emissions reduction target for 2030 was tougher than for the UK as a whole.
It comes after Nicola Sturgeon's government was the first in the world to announce a climate emergency and Glasgow hosted the COP26 climate summit in 2021.
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In 2019, parties argued at Holyrood over how quickly Scotland could speed up the rate of decarbonisation.
Experts warned that the pace was far beyond what they had planned for.
By 2021 greenhouse gas emissions had fallen by 49.2 per cent compared with the baseline level in 1990.
However, the law required a 51.1 per cent drop to remain on track.
It comes after Nicola Sturgeon's government was the first in the world to announce a climate emergency and Glasgow hosted the COP26 climate summit in 2021
PAThe Scottish Government is now likely to introduce a system of "carbon budgets" used by the UK and Welsh governments.
Instead of annual goals, Government chiefs would be told how much greenhouse gas could "safely" be emitted during a parliamentary term.
Ministers would then be required to arrange a plan to achieve the target