Teen climate activist Greta Thunberg is Time's Person of the Year

Teenager, climate activist, and now Time Magazine's Person of the Year.

Greta Thunberg, the 16-year-old Swede who inspired millions to take action.

She launched a grassroots campaign at just 15.

Skipping school every Friday to demonstrate outside Swedish parliament, in a bid to persuade the government to meet its ambitious carbon emission goals.

Since then, she has successfully ruffled many a feather with her uncompromising stance.

(SOUNDBITE) (English) SWEDISH ENVIRONMENTAL ACTIVIST, GRETA THUNBERG, SAYING:

"I shouldn't be up here. I should be back in school on the other side of the ocean. Yet you all come to us young people for hope. How dare you. You have stolen my dreams and my childhood with your empty words."

Brazilian President Jair Bolsonaro called her a "brat."

She has even sparred with President Donald Trump.

Thunberg is currently in Madrid at a United Nations climate summit with many world leaders providing her usual blunt assessment of politicians' efforts.

In the 16 months since her protests began, Thunberg has addressed heads of state, met with the Pope and inspired 4 million people to join the global climate strike.