Gnarly Tree Sustainability Institute

Gnarly Tree Sustainability Institute (GTSI) is a woman-owned B-corporation dedicated to enhancing organizations’ capacity for social, environmental, and economic sustainability. Based in Bloomington, Indiana, GTSI blends consulting with education, preparing the next generation of sustainability leaders through hands-on projects and collaboration with diverse experts. Their unique approach not only addresses complex sustainability challenges but also fosters innovative solutions that contribute to a more sustainable future.