"cbo-costs-2009" . "The Costs of Reducing Greenhouse-Gas Emissions"^^ . "2009"^^ . "http://www.cbo.gov/sites/default/files/cbofiles/ftpdocs/104xx/doc10458/11-23-greenhousegasemissions_brief.pdf"^^ . "report" . . . . . . . _:genid1 . _:genid1 . _:genid1 . _:genid1 .