Climate activist Greta Thunberg has been named TIME magazine's Person of  Year for 2019. The 16-year-old from Sweden beat New Zealand's Prime Minister Jacinda Ardern and  Hong Kong democracy protestors to win  award. Ms Thunberg shot to fame in 2018 for raising people's awareness of  threat to  planet from climate change. She started  global movement when she decided to go on  climate strike outside the Swedish parliament in August 2018. Schoolchildren around  world then followed her example. She has since addressed  United Nations in New York and has met the Pope. After hearing about  award, she tweeted: "Wow, this is unbelievable! I will share this great honour."
Greta Thunberg is  youngest person ever to receive  award. TIME magazine wrote about why it gave  prize to Ms Thunberg. It said she has, "succeeded in creating  global attitudinal shift" in getting millions of people to join  "worldwide movement calling for urgent change". It added: "Greta has offered  moral call to those who are willing to act, and put shame on those who are not." Not everyone is happy with Ms Thunberg receiving  award. Donald Trump Jr said TIME was using  teenager "as  marketing gimmick". In contrast, Hillary Clinton tweeted: "I am grateful for all she's done to raise awareness of  climate crisis, and her willingness to tell hard, motivating truths."