High-profile human rights lawyer and Greens candidate Julian Burnside isn’t just “having a crack” at the Victorian seat of Kooyong – he’s running to snatch the blue-ribbon seat from the Liberals.

The first-time candidate cast his vote at Glenferrie Primary School on Saturday morning, and said he was confident of defeating incumbent, the Treasurer Josh Frydenberg.

He said the issue of climate change will be the clincher that gets him over the line in the traditionally conservative inner Melbourne electorate.

“Climate change is overwhelming the main issue that people are worried about in this electorate, and the reality is that neither of the major parties has a serious plan to tackle climate change,” he told AAP after voting in Hawthorn.

“People in this electorate are concerned that their children and their children’s children will have a world where they can survive.”

He said it was time for change in Kooyong.

“It’s been held by conservatives since Federation and a lot of people have said… it’s first time they felt that they’ve had a choice in the election.”

Mr Frydenberg holds Kooyong on a nearly 13 per cent margin.

Liberal-turned-independent Oliver Yates is also vying for the seat.