Green surge expected in Swiss elections as climate concern grows

Polling suggests climate crisis will be a key factor for more than a quarter of voters

More than 27% of Swiss voters say the climate crisis will be a determining factor in their vote, prompting predictions of a green surge and a fall in support for the nationalist Swiss People's party (SVP) in parliamentary elections on Sunday.

Most voters have already cast their ballots by post in the nationwide poll, which elects 245 members of Switzerland's federal assembly - 200 to the lower house, known as national council, and 46 to the upper house, the council of states.