This story was originally published by Grist and appears here as part of the Climate Desk collaboration. What do you do when your 200-acre glacier—a “Giant of the Alps”—begins to melt from climate change? For a ski resort in Italy, the answer is simple: Put a tarp on it. Sitting on an Alp called Presanella in the northern part of the country, the Presena Glacier is home to a lucrative ski tourism industry. The Pontedilegno Tonale resort operates ski lifts on the glacier, inviting visitors to ride cable cars up…