Josh Frydenberg says Australia has achieved a greater reduction in emissions than New Zealand, Canada and the OECD. Is that correct?

Treasurer Josh Frydenberg says Australia has reduced emissions by 20 per cent on 2005 levels, which he says is greater than New Zealand, Canada and the OECD. (ABC News: Ian Cutmore)

The claim

Coalition MPs in normally safe, inner city seats have been under threat this election from independent challengers, with climate change a key line of attack.