The caller is an automated voice telling Mr Tanner a voter in his electorate ''is voting for leadership on climate change this election''.

The digital doorknock is part of the Australian Youth Climate Coalition's push to tell Australian politicians that if they want votes at this federal election, they need to show they support clean energy.

Federal candidates in Canberra can expect a few phone calls in the coming weeks as the Climate Coalition is hosting a two-day Power Shift youth summit at the Australian National University this weekend training young people how to successfully lobby politicians.

Participants are encouraged to use their social networking nous to spread the word and hassle politicians for action on climate change.

Climate Coalition national director Amanda McKenzie said the campaign is a response to a lack of leadership from the major parties to commit to a carbon tax and invest in renewable energy.

For more on this story, see the print edition of today's Canberra Times.