[1] Alternately, it is a form of libertarianism in which the free market provides environmentally beneficial (or benign) outcomes.
[2] Marcel Wissenburg (2009) maintains that proponents of the latter comprise a minority of green political theorists.
[3] In "Green Libertarianism" (2014), Garvan Walshe suggests that the Lockean proviso should account for ecological concerns.
[9] Walshe's view of green libertarianism attempts to address criticisms of both right- and left-libertarianism.
[11] At the same time, Walshe departs from left-libertarianism—such as Hillel Steiner's assertion that all persons are entitled to equal shares of natural resources[12][page needed]—by asserting that population growth, whether through immigration or births, upsets ecological equilibrium and that (voluntary) immigrants, and the parents of children, are responsible for not impinging upon others' rights to acquire natural services.