Mackenzie Feldman is an environmental activist from Honolulu, Hawai'i. She is the Founder and Director of Re:wild Your Campus (formerly known as Herbicide-Free Campus). Mackenzie worked with a coalition to ban herbicides from every public school in the state of Hawai'i, and led a campaign that resulted in the entire University of California system going glyphosate-free. Mackenzie received the 2019 Brower Youth Award for her work and is a 2022 Rachel Carson Council Fellow and a 2023 Walking Softer Young Leaders Awardee. She is also co-author, with her mother Kathy, of the book Groundbakers, which was published in Fall 2022.