Europe’s highest human rights court ruled Tuesday that countries must better protect their people from the consequences of climate change, siding with a group of older Swiss women against their government in a landmark ruling that could have implications across the continent.

The European Court of Human Rights rejected two other, similar cases on procedural grounds — a high-profile one brought by Portuguese young people and another by a French mayor that sought to force governments to reduce greenhouse gas emissions.

But the Swiss case, nonetheless, sets a legal precedent in the Council of Europe’s 46 member states against which future lawsuits will be judged.

“This is a turning point,” said Corina Heri, an expert in climate change litigation at the University of Zurich.

Although activists have had success with lawsuits in domestic proceedings, this was the first time an international court ruled on climate change — and the first decision confirming that countries have an obligation to protect people from its effects, according to Heri.

She said it would open the door to more legal challenges in the countries that are members of the Council of Europe, which includes the 27 EU nations as well as many others from Britain to Turkey.

The Swiss ruling softened the blow for those who lost Tuesday.

“The most important thing is that the court has said in the Swiss women’s case that governments must cut their emissions more to protect human rights,” said 19-year-od Sofia Oliveira, one of the Portuguese plaintiffs. “Their win is a win for us, too, and a win for everyone!”

The court — which is unrelated to the European Union — ruled that Switzerland “had failed to comply with its duties” to combat climate change and meet emissions targets.