Greta Thunberg's motivation as an activist was shaped by a combination of personal experiences and global crises, including her own struggles with mental health. Diagnosed with Asperger's syndrome, she developed a strong sense of environmental responsibility after learning about climate change and witnessing its impacts on the planet. Her solo protest outside the Swedish Parliament in 2018 ignited the global Fridays for Future movement, calling attention to the climate crisis. Thunberg's activist journey illustrates the significance of youth voices in addressing climate issues and emphasizes the urgent need for political action and ecological awareness in contemporary society.