Select the details from the text that support the main ideas that Mount Everest is popular with climbers and non-climbers, and Mount Everest's popularity has impacted the environment.
A) Every year more and more people flock the mountain, but not everyone goes there to climb. … In recent years, climbers and guides have removed more than 16 tons of litter from Everest.
B) Portable burners and lightweight pots are needed for cooking on the mountain. … Modern transportation allows tourists and adventure seekers to fly into nearby cities.
C) The first climbers to summit Everest were New Zealander Edmund Hillary and Tenzing Norgay. … In 1979, the area surrounding Everest was designated as a natural world heritage site.
D) The government requires climbers to purchase a climbing permit. … Large numbers of climbers on the mountain at once can be unsafe.
