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Xiuhtezcatl started advocating for solutions to the climate crisis in his early childhood. Ever since, activism has been inseparable from his identity—rooted in community, ceremony and a deep relationship to the land.
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By age 10, he started speaking out against fracking and fossil fuel infrastructure in Colorado and helped organize a climate march in Denver that drew over 20,000 people. Soon after, he became Earth Guardians’ Youth Director, traveled to Brazil to speak and perform at the UN Conference on Sustainable Development, and joined climate leaders like NASA’s James Hansen to call on President Obama to adopt a national Climate Recovery Plan.
In 2015, he addressed the United Nations General Assembly as its youngest-ever climate speaker and joined 20 other youth plaintiffs in Juliana v. United States, suing the federal government for failing to act on climate change. Through persistent local organizing, Xiuhtezcatl helped bring about the closure of Boulder’s last coal-fired power plant, and by 17, published his first book, We Rise.
After publishing his second book, Imaginary Borders, he moved to Los Angeles, where he co-led a land back initiative returning 12 acres to the Gabrielino Shoshone Nation with the city’s only Indigenous school, Anawakalmekak. During this time, he began studying his native language and released TONATIUH — an album in English, Spanish and Nawatl, celebrated for its contribution to Indigenous visibility and language reclamation.
“An inspiring story that will change the way all of us think about the climate crisis—and how we can solve it.”
—Van Jones
“Martinez presents a meaningful, heartfelt call to action with content that reflects current issues. An essential purchase for any high school or public library.”
—School Library Journal
“A hopeful, well-argued book on climate change written in a refreshing new voice.”
—Kirkus Reviews
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“Climate change will impact the livability of our planet for future generations. Xiuhtezcatl, through his art, is informing and galvanizing a new movement of leaders who are ready to emerge as our best hope for a brighter future.”
—Leonardo DiCaprio
“This book offers practical solutions for how every day people can be a part of the most important movement in the history of humanity.”
—Mark Ruffalo
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