005350000a220018100045000410014000002450067000143000017000816500010000986500023001086500023001316500018001546500025001720410013001970440019002107100026002291100058002552600040003130 aEspañol10aGlobal Changesscientific overview, a national videoconference  a82 min.bVHS14aClima14aCambio climático14aEfecto invernadero14aCapa de ozono14aCalentamiento global0 aInglés  aEstados Unidos1 aUniversity of Nebrask1 aNational Oceanic and Atmospheric AdministrationsNOAA  as.l.bUniversity of Nebraskac1990?