(1)In this Act, the “baseline” means the aggregate amount of—
(a)net Scottish emissions of carbon dioxide for 1990; and
(b)net Scottish emissions of each of the greenhouse gases other than carbon dioxide for the year that is the baseline year for that gas.
(2)The baseline years for greenhouse gases other than carbon dioxide are—
(a)for methane, 1990;
(b)for nitrous oxide, 1990;
(c)for hydrofluorocarbons, 1995;
(d)for perfluorocarbons, 1995;
(e)for sulphur hexafluoride, 1995.