
But the UN environment programme, working with the World Meteorological Organisation, said these "short-lived climate forcers" contribute as much as 25-30% to present-day climate change emissions, and if controlled would also provide dramatic health and farming benefits. "A small number of emission reduction measures ... offer dramatic public health, agricultural, economic and environmental benefits," said Achim Steiner, the head of the UN environment programme.
Black carbon affects climate by intercepting and absorbing sunlight, darkening snow and ice when deposited, and helping to form clouds. It is most noticeable at the poles, on glaciers and in mountain regions – all environments which are showing the greatest impact of climate change. The full impact of black carbon is still being assessed but it is linked to the melting of the glaciers in the Himalayas, disruption of traditional rainfall patterns in India and Africa, and low yields of maize, rice, wheat and soya bean crops in Asia and elsewhere. It is also partly generated by wood-burning stoves and dirty diesel cars….
A campfire shot by Eric Dufresne, Wikimedia Commons via Flickr, under the Creative Commons Attribution 2.0 Generic license
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