Environmentalists have blamed a winter drought for less vegetation in the northern grasslands resulting in increased risks of dust blowing into Beijing during the dry windy spring. 环保专家称，去年冬天北方旱情严重，草地植被枯干程度较高，地表浮土裸露，遭遇干燥大风极易形成扬尘。
The very hot surfaces of steam heating cause a parching effect on the air, often accompanied by a disagreeable odor of burnt dust. 蒸汽表面的高温在空气中产生了烘烤的效果，并常常伴随着燃烧的飘尘的令人讨厌的气味。
In this work, samples of airborne particulates,vent gas and smog dust during heating and non-heating seasons were collected in the urban and suburban areas of Lanzhou. 本文收集了兰州市区和郊区在取暖期和非取暖期的大气飘尘样品和汽车尾气及烟尘样品。
