Green legal theory (GLT) is an overarching critical legal theory that uses many legal
ideologies and theories to review and improve the law concerning environmental issues.73 It
applies other legal ideologies and theories as its basis to examine whether the law functions to
resolve environmental problems.74 For example, GLT reconsiders the public trust doctrine that
holds that the government is a trustee of natural resources on behalf of the public and this
doctrine is embedded in many areas of law, such as the law of public domain and the law of
common goods.75 There are many perspectives from which GLT observes the law and legal
systems, e.g. the foundations of environmental law, economic impacts and incentives,
geographical dimensions, and eco-politics. Green legal theorists criticize environmental law
and seek alternatives to the new natural law, such as: indigenous peoples’ perspectives on
conservation, Eastern philosophy, “bottom up” approaches, and grassroots participation.