Guardian: Glaciers in the Himalayas and the Tibetan plateau that feed the river systems of almost half the world’s people are melting faster because of the effects of clouds of soot from diesel fumes and wood fires, according to scientists in India and China. The results, to be announced this month in Kashmir, show for the first time that clouds of soot – made up of tiny particles of “black carbon” emitted from old diesel engines and from cooking with wood, crop waste or cow dung – are …