Greta Thunberg is a Swedish environmental activist born in 2003. She gained international recognition for her efforts to raise awareness about climate change. At just 15, she started the "Fridays for Future" movement, skipping school to protest outside the Swedish parliament. Her powerful speeches at global platforms like the UN Climate Action Summit have inspired millions to take action. Time magazine named her Person of the Year in 2019. Thunberg continues to be a leading voice in the fight against climate crisis.