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That study also appeared in the Proceedings of the National Academy of Sciences , one of the world 's most-cited multi-disciplinary scientific serials . " After spending time touring the LAX decontamination units , I remain convinced that LAX is one of the world 's safest airports , " Hahn said . But instead of tailoring a message to have the widest possible appeal , Edwards , a former US senator and his party 's vice presidential candidate in 2004 , has charted a bold course for the presidency : He wants to lead a moral crusade against persistent poverty and widening inequality in the world 's wealthiest nation . Japan should set its goal at no less than becoming the world 's safest and most comfortable society . In the world 's wealthiest nations , members of the Organization of Economic Cooperation and Development , at least 34 million people are unemployed . Yet NATO , the European Union , the G-8 and the Wassenaar Arrangement - whose memberships comprise many of the world 's wealthiest countries - have also added light weapons control to their agendas . This reflects the public benefit conveyed to all Americans by the world 's safest , most efficient national airspace system . " Because industrial diamonds , like their engagement ring counterparts , rank among the world 's hardest substances , manufacturers have for years mixed them with soft metals , epoxies , and organic resins to make polishing and grinding wheels . Coogan 's judgment is unsparing : the British , the Ulster Protestant fanatics , the Catholic Church and , finally , the Irish people themselves all get their feet held to the fire for their roles in the Western world 's nastiest and longest-lasting family feud . Researchers contend that the world 's wealthiest counties consumer 86 % of the world 's goods and services , while the poorest 20 % , the majority of whom are women , consumer only 1.3 % .