The Nepali Army conducts a search-and-rescue operation on Sept. 10 inside the Chilime Hydropower Station tunnel days after the deadly flash floods and mudslides in Nepal's Rasuwa district in August. In the wake of the disaster, concerns are being raised about the impact of the construction of hydropower plants and dams in the Himalayas. Skanda Gautam/AFP/via Getty Images Skanda Gautam/AFP/via Getty Images KATHMANDU, Nepal — On a recent September day, Sumana Shrestha Amatya stood alongside other protesters in the Nepali capital, urging the government to work faster to find their loved ones, trapped inside hydropower plants since flash floods devastated…