Just over a year ago, the now world-famous climate activist Greta Thunberg began to strike for the climate. Today she has been joined by millions of people all over the world.

Last week began what is believed to be the world's largest climate strike - and on Friday, global protests are expected to continue.

Goes with the Prime Minister

"The #climateweek continues!", Greta Thunberg writes on her Instagram account during early Friday morning, Swedish time, where she posted a picture of strikes in New Zealand.

Thunberg, who spoke at the UN Climate Summit this week, will lead the climate strikes in the city of Montreal, Canada today. In March, Canadian Prime Minister Justin Trudeau is expected to participate, as is Elizabeth May, party leader for Canada's Green Party. The strike takes place just over a month before the election in Canada, where the climate has become an important issue, Reuters news agency writes.

Climate activist Greta Thunberg goes directly from the UN Climate Summit in the United States to Canada to participate in the climate strikes there, she said on Thursday. Photo: Screenshot

Strikes every Friday

When Greta Thunberg, as a 15-year-old, sat outside the Parliament House in September 2018 to strike for the climate, she was initially alone. Soon she was joined by more young people.

During the hashtag #fridaysforfuture, young people all over the world were invited to school strike for the climate, and the movement of the same name - Fridays for future - has since the school strike for the climate every Friday.