In the working room should not have dust because it has a direct danger to the body is a body to exhaustion. Emotional stress and are sick. This should include cleaning work desk clean, dust-free.
The office should not be dusty because it is directly harmful to the body, the body is weak. Emotional stress and illness. Which should be cleaned with a clean desk free of dust.
In the work, it should not have dust, because it is directly to the body is the body fatigue. Emotional stress and illness. Which should clean the desk clean without dust.