Activism

Greta Thunberg does not have a 19-year-old sister. Her younger sister, Beata Ernman Thunberg, is currently 17 years old (as of March 2026). Beata is also an activist, following in her older sister’s footsteps. Understanding Greta Thunberg’s Family and Activism Greta Thunberg, the prominent climate activist, has become a global figure for her tireless…