Guardian: Hotel guests should have their electricity monitored; hefty aviation taxes should be introduced to deter people from flying; and iced water in restaurants should be curtailed, the world’s leading climate scientist has told the Observer. Rajendra Pachauri, the chair of the Intergovernmental Panel on Climate Change (IPCC), warned that western society must undergo a radical value shift if the worst effects of climate change were to be avoided. A new value system of “sustainable …