Climbing has become an increasingly popular sport with over 25 million climbers worldwide in 2012. The document outlines some of the essential equipment needed for climbing such as a helmet, harness, carabiners, and medical supplies. It also discusses international organizations that oversee competitive climbing and lists some of the most dangerous climbing sites in the world, including Mount Everest, K2, and Kangchenjunga. The risks of climbing are also addressed, such as falls, equipment failures, or accidents that could result in death.