IPS: For the last two climbing seasons, Dawa Sherpa has missed scaling the summit of Mt Everest. But the climate ambassador for the World Wildlife Fund (WWF) and two-time Everest summiteer may not be relishing the thought of bearing witness once more to the impact of rising temperatures on the world’s highest peak. Indeed, he says that even making one’s way just up to Base Camp, which lies at an altitude of 5,380 metres, can already give one the dismal view of the devastation climate …