A poll in Germany shows the Green Party has drawn level for the first time with the Social Democrats, the main opposition party.
The Greens are campaigning against government plans to extend the use of nuclear energy.
One of the biggest anti-nuclear rallies in years was held at Chancellor Angela Merkel's office on Saturday.
Surveys show a majority of Germans are opposed to extending the life of nuclear power stations and the government faces a battle to get the measures through parliament.
