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People File • Activist

Severn Cullis-Suzuki

Severn Cullis-Suzuki is a Canadian environmental and social justice activist, writer, and speaker born in 1979.

Updated September 12, 20261 min readCited sources

Severn Cullis-Suzuki is a Canadian environmental activist best known for her 1992 speech at the Rio Earth Summit when she was 12 years old. She is the daughter of environmentalist David Suzuki and has spent her career advocating for intergenerational justice and biodiversity.

Early life and family

Severn Cullis-Suzuki was born in Vancouver in 1979 to David Suzuki and Tara Elizabeth Cullis. As a child, she co-founded the Environmental Children’s Organization, sparking an early commitment to environmental advocacy.

Rio Earth Summit speech

In 1992, at age 12, she addressed the United Nations Conference on Environment and Development in Rio de Janeiro. Her speech, which includes the famous line “If you don’t know how to fix it, please stop breaking it!”, became internationally known for its urgent call to protect the environment for future generations.

Career and later work

Cullis-Suzuki has worked as an activist, writer, and speaker, focusing on biodiversity, language revitalization, and reconciliation. She served as executive director of the David Suzuki Foundation from 2021 to 2025 and completed a PhD in Linguistic Anthropology in 2025.

In short

  • Delivered famous speech at age 12 at Rio Earth Summit
  • Daughter of environmentalist David Suzuki
  • Served as executive director of the David Suzuki Foundation 2021–2025
  • Focuses on intergenerational justice, biodiversity, and reconciliation
Canadian angle

She is a Canadian activist born in Vancouver, and her public work has been closely connected to Canadian environmental issues, the David Suzuki Foundation, and Haida Gwaii in British Columbia.

Quick questions

Who is Severn Cullis-Suzuki?
Severn Cullis-Suzuki is a Canadian environmental and social justice activist, writer, and speaker best known for her 1992 Rio Earth Summit address.
How old is Severn Cullis-Suzuki?
She was born on 30 November 1979, making her 46 years old as of July 2026.
What did Severn Cullis-Suzuki say at the Rio Earth Summit?
She urged leaders to protect future generations and the environment. Her speech includes the famous line: “If you don’t know how to fix it, please stop breaking it!”

Sources

  1. Wikipediahttps://en.wikipedia.org/wiki/Severn_Cullis-Suzuki
    Supports: Birth date, nationality, occupation, and family relationship to David Suzuki.
  2. David Suzuki Foundationhttps://davidsuzuki.org/expert/severn-cullis-suzuki/
    Supports: Her role as activist, her Rio Earth Summit speech at age 12, and service as executive director from 2021 to 2025.
  3. Severn Cullis-Suzukihttps://www.severncullissuzuki.com/bio
    Supports: Biography, Rio Earth Summit speech, current focus, education, and residence.
  4. University of Victoriahttps://www.uvic.ca/socialsciences/careers/departments/environmental/profiles/cullissuzuki-severn.php
    Supports: Her environmental and social justice work, board involvement, and media work.
  5. The Guardianhttps://www.theguardian.com/environment/2022/jun/11/severn-cullis-suzuki-earth-summit-speech-greta-thunberg
    Supports: The content and historical significance of her Rio Earth Summit speech.