"I think we are only seeing the beginning".
"I think it's unbelievable to see that hundreds of thousands of children all around the world are realising that we are facing an existential climate crisis and are fighting for their future, making their voices heard, and saying why should we go to school and study for a future that may not exist anymore".
University students congregate on campus before they leave
"Why would we go to school if there's going to be no future for us to live in?" said Althea Wilson, a high school junior from the Boulder area.
"And you know who you are, you that have ignored this", she said.
Greta Thunberg, in August a year ago, became the face of a "school strike" outside the Swedish parliament building.More news: Colton Underwood's Season of The Bachelor: Who is the New Bachelorette?
Rachel Gurevich, a 14-year-old student at East Brunswick's Churchill Junior High and one of the organizers of the Morristown strike, said she was hopeful that the global protests would push policymakers to take action. "The oceans are rising, so are we", read another in Sydney. By December, more than 20,000 students had taken on Thunberg's mantle, striking in at least 270 cities.
At a rally in Stockholm on Friday, Thunberg said the world faces an "existential crisis, the biggest crisis humanity ever has faced and still it has been ignored for decades by those that have known about it". Campaigners have judged that insufficient action has been taken since the report came out.More news: Palestinian groups decry Israel assaults on worshippers
"The clock is ticking and time is against us!" they shouted.
French education minister, Jean-Michel Blanquer, has so far responded by saying that he would like to organise debates on climate change and environmental issues in every French lycée.
"We have proposed Greta Thunberg because if we do nothing to halt climate change it will be the cause of wars, conflict and refugees", Norwegian lawmaker Freddy André Øvstegård told Norwegian news outlet VG.
The group is also chanting: "You should be embarrassed that we pulled out of of Paris", a reference to President Trump's decision to withdraw the United States from the Paris Climate Accord. "You get the feeling of this isn't okay - we can't sit and do nothing".More news: Facebook & Instagram experience massive outage across US & Europe
Thousands attended Nelson climate change protests on the Cathedral steps.