North Base Camp for climbers trying to reach Everest from the Tibet approach is surprisingly easy to reach—tourists can get there in a car. And they have been in increasing numbers, leaving behind a mountain of trash. In 2015, more than 40,000 travelers visited Tibet’s North Base Camp, according to the Chinese Mountaineering Association. Last spring, 8 tons of garbage, including human feces, was removed from the area. Climbers with permits for reaching the summit will still be allowed to use North Base Camp, of course. But those numbers have already been limited to just 300 in an announcement earlier this year.