The amount of dust being blown across the landscape has increased over the last 17 years in large swaths of the West, according to a new study led by the 精品SM在线影片. The escalation in dust emissions 鈥 which may be due to the interplay of several factors, including increased windstorm frequency, drought cycles and changing land-use patterns 鈥 has implications both for the areas where the dust is first picked up by the winds and for the places where the dust is put back down.