Mr Thapa said that the price of the animals had risen by a quarter in Kathmandu - but the government hoped that further increases would not happen because 6, 000 goats were being brought into the city.

BBC: Nepal hit by severe goat shortage

The attention caused by Everest's trash problem is a step in the right direction, said 31-year-old Suman Thapa, who started working as a porter at 17, but the mountain has a long way to go.

BBC: Everest's growing problem