The Guardian reports
Invasive species proliferating in Valais is encroaching on natural reserves and posing a biodiversity threat
The residents of the Swiss canton of Valais are used to seeing their mountainsides covered with snow in winter and edelweiss flowers in summer. But as global heating intensifies, they are increasingly finding an invasive species colonising the slopes: cacti.
Read more at Cacti replacing snow on Swiss mountainsides due to global heating | Plants | The Guardian
Natural History Wanderings 
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