Getting nekkid for a good cause. . . . .

Bettmeralp's mayor, Heidi Kreuzer, was unimpressed by the fuss.

"There's no need to get undressed, I can show you very nice pictures of the glacier," she told the Swiss newspaper Le Matin.

Environmental issues have considerable resonance in mountainous Switzerland, which has been hit by a growing number of damaging flash floods and landslides in recent years due to stronger storms and rainfall, as well as heatwaves.

A Swiss government report this week underlined that temperatures were rising faster than the global average, and measures needed to tackle the impact of global warming would cost the country about one billion Swiss francs (833 million dollars, 617 million euros) a year.

The country's 1,800 glaciers are regarded as a visible barometer of global warming.

Their data also shows that all Switzerland's main glaciers are retreating and the melting has accelerated since the mid-1990s, according to scientists at Zurich's Federal Polytechnic (ETHZ).

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