Science. 1981 Dec 18;214(4527):1344-6. doi: 10.1126/science.214.4527.1344.
The combustion of wood and yak dung for heating and cooking in a populated Nepal Himalayan valley contributes significantly to the ambient airborne concentrations of lead, copper, aluminum, magnesium, and elemental and organic carbon. A comparison of the concentrations of these elements in fresh snow with corresponding values in air suggests that the pollution aerosol is confined to the valley, with pristine air aloft.
在尼泊尔喜马拉雅山谷的人口聚居区，燃烧木材和牦牛粪来取暖和做饭，会大大增加环境空气中铅、铜、铝、镁以及元素碳和有机碳的浓度。将新鲜雪中这些元素的浓度与空气中相应值进行比较表明，污染气溶胶局限在山谷内，而高空则是原始空气。
