The Welsh Government will aim to reach net-zero greenhouse gas emissions by 2050, in response to recommendations by the Committee on Climate Change (CCC).
It comes after a UK Government report said Wales should aim to cut greenhouse gases by 95% by 2050 to help tackle global warming.
The report from the Committee on Climate Change made the recommendations to lower emissions relative to levels recorded in 1990.
The target is less than the ''net zero'' emissions the report recommended for the UK. It said this was due to high agricultural emissions in Wales that would be hard to reduce.
Minister for Environment, Energy and Rural Affairs, Lesley Griffiths confirmed Wales' ambition and said The Welsh Government will bring regulations to the Assembly next year to amend the existing 2050 target.
But Friends of the Earth Cymru said Wales ''could do better'' and should aim higher than the 95% reduction asked for.
The CCC report comes as Assembly Members in the Senedd become one of the first parliaments to vote to declare a ''climate emergency'' this week.
The Welsh Government said the move ''draws attention to the magnitude and significance'' of climate change.
It follows increasing pressure from climate change group Extinction Rebellion in Wales and the growing popularity of teenage activist Greta Thunberg.
Minister for Environment, Energy and Rural Affairs, Lesley Griffiths, warned climate change threatened the "economy, infrastructure and natural environment".
She added that Welsh Government legislation must "set a new pace of change".