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The bark from cedar or hemlock is more tan in color, as the processes which produce these types of barkdust may leave a greater percentage of wood (as opposed to bark) in the resulting material. Shredded Douglas fir bark is known for its many slivers, those who handle it with bare hands or walk on it with bare feet are likely to get splinters ...
Exposure to wood dust also occurs through handling of compost containing wood dust. One study measured dust concentrations resulting from handling of compost material consisting of successive layers of chopped leaves, bark, and wood; visible clouds of fine particles were easily generated when the compost material was agitated. [2]
Image credits: Ross Burgener Meanwhile, for Dr. Brandon, the most beautiful natural phenomenon is the northern lights, whereas the most fascinating is the diel vertical migration.
Harmattan, a dry wind that blows from the northeast, bringing dust from the Sahara south toward the Gulf of Guinea. Khamsin ( khamaseen in Egypt) and similar winds named Haboob in the Sudan, Aajej in southern Morocco, Ghibli in Libya and Tunisia, Harmattan in the western Maghreb , Sirocco , a south wind from the Sahara and Simoom in the Arabian ...
Researchers suspect suburban communities north of Salt Lake City could be receiving the majority of the dust that blows off the lake. (Evan Bush / NBC News) So much remains unknown.
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Dust abatement refers to the process of inhibiting the creation of excess soil dust, a pollutant that contributes to excess levels of particulate matter. Frequently employed by local governments of arid climates such as those in the Southwest United States , dust abatement procedures may also be required in private construction as a condition ...
High winds and blowing dust were reported throughout central California on November 29, 1991, both in the San Joaquin Valley and the Salinas Valley.A weather station at Naval Air Station Lemoore, the closest one to the crash site which tracked wind and visibility statistics, measured wind gusts up to 21.6 metres per second (48 mph; 78 km/h) and visibility as low as 0.5 kilometers (0.31 mi).