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PayPal 's service builds on the existing financial infrastructure of bank accounts and credit cards and utilizes the world 's most advanced proprietary fraud prevention systems to create a safe , global , real-time payment solution . Our planned facility will bring together faculty and students in a safe , environmentally-friendly set of laboratories , classrooms , and common spaces that will facilitate engaged learning . Radon is thus effectively collected and exhausted to a safe , outside location . That interpretation ensures that local public housing officials have the authority they need to assure the families who make their homes in public housing that they will have a safe , drug-free environment .