How has the CO2 concentration changed over long time scales? What were the pre-industrial concentrations?

    How has the CH4 concentration changed over long time scales? What were the pre-industrial concentrations?

     How has the N2O concentration changed over long time scales? What were the pre-industrial concentrations?

    How can ice cores tell us about the past?

    Australian Antarctic Division.

    References


    Longterm Trends | Global Warming | ChemConnections