Work on including Rights of Nature in constitutions, national statutes, and local laws has been done internationally for decades. “Rights of Nature Law and Policy” page at the Harmony and Nature United Nations has a comprehensive list of events.
http://www.harmonywithnatureun.org/rightsOfNature
“The law has seen the beginning of an evolution toward recognition of the inherent rights of Nature to exist, thrive and evolve. This evolving legal approach acknowledges that the traditional environmental regulatory systems generally described herein regard nature as property to be used for human benefit, rather than a rights-bearing partner with which humanity has co-evolved.
Rights of Nature is grounded in the recognition that humankind and Nature share a fundamental, non-anthropocentric relationship given our shared existence on this planet, and it creates guidance for actions that respect this relationship.”
Snohomish County Community Rights 