Within National there are a number of organised groups of members, called Special Interest Groups, that share a particular belief, interest or cause. Other groups are also involved in the party's policy reviews. For instance, the Bluegreens are a group within National who help formulate environmental policy. The party's youth wing, the Young Nationals (commonly known as the "Young Nats"), has provided much political impetus as a ginger group. Often the more social-liberal views of the Young Nats have been at odds with those in the senior party.