“Greta, do not let anyone dim your light ... Pay no attention to the doubters and know that millions of people support you,” she wrote.
Earlier, US President Donald Trump criticized the award of the Swedish eco-activist Grete Thunberg the title of "Person of the Year" by Time magazine, calling this decision ridiculous.
On December 11, Time named 16-year-old Thunberg the man of the year. She became the youngest to receive this title in history.