Labor believes it has finally found the “killer ad” to prosecute the Liberal Party’s inaction on climate change and connect with younger voters in the final days of the campaign.

With just 48 hours until an advertising blackout hits free-to-air television, the ALP has dumped a powerful negative ad into the mix designed to capture swinging voters worried about climate change.

The Liberal Party is also preparing to dump millions of dollars of negative ads into TV, radio and Facebook in a final pitch to stop the election of a Bill Shorten government.

Labor’s new “doomsday” advertisement opens with the words “climate change” before running images of natural disasters including bushfires, floods and cyclones.

As former prime minister Tony Abbott appears on the screen the advertisement states: “He denies it”, before adding “He got dumped over it” over an image of Malcolm Turnbull, and “He ignores it” in relation to Scott Morrison and “He bungled it,” over an image of Barnaby Joyce.

Abbott denies it. Turnbull got dumped over it. Morrison ignores it.

Whilst the Liberals’ indecisiveness continues, Australia is dealing with the real chaos of climate change.

This election, end the chaos, vote for real action on climate change – vote Labor. pic.twitter.com/0gShtFc4Lb

— Australian Labor (@AustralianLabor) May 13, 2019

But the ad then links the inaction over climate change and division within the Liberal Party and the preference deals with Clive Palmer and One Nation to warn voters it is “nothing compared to the chaos of a Morrison-Hanson-Palmer government”.

The ALP remains confident the Liberals have miscalculated over focusing political attacks on the economic impact of its climate change policy because voter concern over the issue has continued to rise through the election.

“This election is about the future. It’s about the future we hand on to our kids. It’s about the sort of future we want for this country. This government has proven incapable of taking any serious action on climate change in the last six years,” Mr Shorten said.

“This election is a turning point for how the nation deals with climate change. We’re ranked 55th out of 60 countries for the way we’re handling climate change. The prime minister acknowledges that under him our carbon pollution has gone up and is projected to go further up.

“The future generations of Australia deserve better from the current crop of political debate.”

Labor also remains hopeful the climate change issue can help it connect with thousands of younger voters who joined the electoral roll to vote for same-sex marriage.

On that front, Mr Morrison on Monday refused to say if he still opposed gay marriage, telling reporters he“always supports the law of the country”.

“It’s law and I am glad that the change has now been made and we and people can get on with their lives. That’s what I am happy about. I always support the law of the country,” he said.

When asked if he believed gay people were going to hell, he did not answer the question, instead choosing to talk about his faith.

“It’s always been something that has informed how I live my life and seek to care for and support others. That’s what I seek to do … You know, none of us are perfect. None of us are saints in that respect,” he said.

“We try and do what’s right and we try and do what’s best and that’s what always sought to guide me in terms of my own personal faith.”

Mr Morrison is focusing on the economy, Labor’s big-taxing agenda and negative gearing in his final pitch to voters.

The Real Estate Industry of Australia is backing in the Prime Minister, sending letters to thousands of renters across Australia on official letterhead this week that rents will rise if Mr Shorten is elected.

But ACOSS described the claims as “wild” and Labor’s treasury spokesman Chris Bowen said the claims were “downright lies”.