Swedish teenage climate activist Thunberg turns 18

"Thank you so much for all the well-wishes on my 18th birthday!," Thunberg said on Twitter.

Swedish climate change activist Greta Thunberg attends the 50th World Economic Forum (WEF) annual meeting in Davos, Switzerland, January 21, 2020. (photo credit: DENIS BALIBOUSE / REUTERS)
Swedish climate change activist Greta Thunberg attends the 50th World Economic Forum (WEF) annual meeting in Davos, Switzerland, January 21, 2020.
(photo credit: DENIS BALIBOUSE / REUTERS)
Sweden's Greta Thunberg, who pioneered a global climate change campaign as a 15-year-old, turned 18 on Sunday and promised to celebrate by exposing "dark secrets" at her local pub.
"Thank you so much for all the well-wishes on my 18th birthday!," Thunberg said on Twitter.
"Tonight you will find me down at the local pub exposing all the dark secrets behind the climate- and school strike conspiracy and my evil handlers who can no longer control me! I am free at last!!."
Thunberg began a climate change campaign that swelled from a one-person school strike to a worldwide movement, drawing in millions of school children, as well as adults.
She criticized world leaders over climate change in a speech to the United Nations in 2019, has clashed with U.S. President Donald Trump, and last month called for urgent action five years on from the Paris Accord.