Mount Everest and the Himalayas: A Devastating Garbage Crisis.

Climbers have turned the Himalayas into a "gigantic rubbish bin," according to conservationist Luc Boisnard, who founded Himalayan Clean-Up to raise awareness about Himalayan pollution. Footage from the expedition shows Boisnard and his team trudging through heaps of waste, including plastic bottles, sanitation pads, and abandoned tents. Nepalese authorities introduced a law in 2014 requiring climbers to leave a "garbage deposit" prior to their ascents, but critics argue that the scheme is ineffective. Nepalese mountaineer Nirmal Purja has launched the Big Mountain Clean-up project to remove waste from the mountains.