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Pages 25-27

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From page 25...
... Primary PM can be described as either volatile or non-volatile. Nonvolatile PM has a size distribution that differs from the volatile PM generated by aircraft gas turbine engines.
From page 26...
... Brake and tire wear rates typically are reported as mg/vkm and can vary greatly depending on braking conditions. For light-weight vehicles, the brake wear rates range from 8.8 mg/vkm to 20 mg/vkm (Legret and Pagotto 1999)
From page 27...
... For example, all taxicabs permitted to pick up passengers at Seattle Tacoma International Airport are required to use compressed natural gas. Through fees and licenses, some airports have taken strides to reduce the frequency of circulating through the airport by hotel, parking, and car rental vans.


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