<Li> Reducing vehicle maintenance costs by lowering the levels of dust that clog filters, bearings and machinery . </Li> <Li> Reducing driver fatigue, maintenance on suspension systems and improving fuel economy . </Li> <Li> Increasing cumulative effect - each new application builds on previous residuals reducing re-application rate * while improving performance . </Li> <P> US federal laws require dust control on sources such as vacant lots, unpaved parking lots, and unpaved roads . Dust in such places may be suppressed by mechanical methods, including paving or laying down gravel, or stabilizing the surface with water, vegetable oils or other dust suppressants, or by using water misters to suppress dust that is already airborne . </P>

Where did the dust originate on the human body