Nepal’s President Ram Baran Yadav (centre) poses for a group photograph with (from left) Dawa Steven Sherpa, Saurav Dhakal, Apa Sherpa and Samir Jung Thapa during the handing over of the country’s national flag at the President’s Office in Kathmandu. On Sunday, Apa and his team will begin a 1,700km, 120 days trek dubbed the ‘Great Himalayan Trail’ to highlight the impact of climate change