Swedish activists, including Greta Thunberg, sue state alleging climate policies violate human rightsHundreds of activists — including Greta Thunberg — have marched through the Swedish capital to file a lawsuit against the Swedish state for what they say is insufficient climate action.Key points:- Climate activists want a court to determine if Sweden has violated human rights with its climate policies- Hundreds of young people under the age of 26 signed the document that is the basis for the lawsuit- Climate campaigners have launched numerous lawsuits against governments and companies in recent years, with mixed successMore than 600 young people under the age of 26 signed the 87-page document that is the basis for the lawsuit which was filed in the Stockholm District Court.Another activist, Ida Edling, said Sweden was "pursuing a climate policy the research is very clear will contribute to a climate disaster in the future".Sweden's parliament decided in 2017 that by 2045, the Scandinavian country was to have zero net emissions of greenhouse gases into the atmosphere and 100 per cent renewable energy.The German government reacted by bringing forward its target for net zero emissions by five years to 2045 and laying more ambitious near- and medium-term steps to achieve that goal."