Ice Core from
Vostok, Antarctica
During last ice age (>18,000 years
ago)
Temps 6oC colder CO2 levels 30% lowerCH4 levels 50% lowerH2O levels were lowerthan current interglacial.
What caused what?
Temps 6oC colder CO2 levels 30% lowerCH4 levels 50% lowerH2O levels were lower