Greta Thunberg is a Swedish environmental activist who has gained international recognition for her work to raise awareness of climate change. She began her activism in August 2018, when she began a school strike for the climate outside the Swedish parliament. Since then, she has become a prominent figure in the global climate movement, inspiring millions of people to take action. She has addressed the United Nations, spoken at the World Economic Forum, and been nominated for the Nobel Peace Prize. Her work has been praised by world leaders and she has been named one of Time Magazine's 100 Most Influential People of 2019.