Koom nrog Z Zej Zog - tau txais cov xwm txheej caw, tshaj tawm, Lub Limtiam Digest, thiab lub sijhawm los koom nrog.
Cov ntaub ntawv muab tso ua ke los ntawm Center for Responsive Politics thiab commissioned los ntawm Union of Concerned Scientists qhia tias nyob nruab nrab ntawm 2009 thiab 2011,…