 As an Annex B party, the National Government agreed to commit to a target of limiting greenhouse gas emissions for the five-year 2008–2012 commitment period (CP1) to five times the 1990 volume.New Zealand may meet this target by either reducing emissions or by obtaining carbon credits from the international market or from domestic carbon sinks.Jim Bolger, leader of the National Party since 1986, led the party to a landslide victory in the 1990 general election, winning nearly half the popular vote and more than two-thirds of the seats in parliament—the biggest majority government in New Zealand history.