The government is scrambling to buttress its climate change credentials amid growing domestic and international criticism, and one MP even embraced Labor's renewable energy target just months after claiming it would ruin the economy.

On Wednesday, Environment Minister Sussan Ley restated her firm belief that climate change was behind the bushfires ravaging the east coast while Liberal MP Tim Wilson distributed a meme on social media lauding the fact that more than half of Australia's energy will be renewable by 2030.

Scott Morrison during a press conference in Sydney on Wednesday, amid the haze of bushfire smoke. The Coalition is now embracing the 50 per cent renewables target. AAP

Labor took to the past two elections a 50 per cent renewable energy policy by 2030 and was attacked by the Coalition for doing so.

"Now, Bill Shorten wants to replicate South Australian Labor’s 50 per cent renewable target on a national level, which will mean higher electricity prices,'' the Coalition's campaign material argued before this year's election.

It contended that in combination to cut emissions by 45 per cent over 2005 levels by 2030, Labor's renewable energy policy would cost the economy $472 billion, slash more than 336,000 jobs, cut the average wage by more than $9000 and increase wholesale electricity prices by more than 58 per cent.