More than 3,000 people have stood atop Mount Everest since the world's highest peak was first climbed by Edmund Hillary and Tenzing Norgay 60 years ago. Each year, hundreds of climbers ascend the 8,848-meter high mountain.
But not all of them are professional mountaineers. Climbing Mount Everest has become part of the adventure industry. In 2013, the first Saudi woman , set of twins, and female amputee made the summit. Other mountain records include the first wedding, the first video call, and the first Harlem Shake. But all of these firsts come with a downside: the booming alpine tourism industry is having a big environmental impact.