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She noted that even a few hundred dollars could buy small advertisements in local " Penny Saver " circulars that would effectively target those most in need of QAC services . Further , research and evaluation efforts to inform all facets of strategic communications are limited by the relatively small budget in Washington , D.C ., allocated to such efforts and a general lack of expertise in the field with regard to commissioning and conducting such studies . There would be diminishing returns to small refiners from such an option over time , as a growing portion of the vehicle miles traveled would be from vehicles with emission control devices requiring ultra-low sulfur . Some pages on this site use " cookies , " which are small files that the site places on your hard drive for identification purposes . So gradually over time , small groups of people in different areas would become distinct in some ways .