Children around the world launched another wave of school strikes demanding action on climate change Friday, in their first major action since the issue topped world leaders' agenda at the United Nations this week.
Some of the first protests began in New Zealand, where Thunberg said organizers estimated 170,000 people marched across the country. There were also marches in cities in Italy, Finland, Nigeria, Austria and India, among other countries.
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Friday's protest followed a week of climate talks at the U.N. in New York, which included a scathing speech by Thunberg to world leaders reprimanding them for inaction.
"You have stolen my dreams and my childhood with your empty words," she said Tuesday. "The eyes of all future generations are upon you and if you choose to fail us, I say we will never forgive you."
Citing a U.N.-backed report released last year, demonstrators are demanding governments implement measures to prevent global temperatures from rising more than 2.7 degrees Fahrenheit, which scientists warn could result in dire consequences for human life and the planet.
Thunberg and the young people she has inspired say they will not stop their weekly classroom walkouts until they see a reduction in greenhouse gas emissions responsible for climate change.
In Nigeria's capital Abuja, Oladosu Adenike marked her 46th consecutive strike Friday. The activist posted images on Twitter of students dressed in blue school uniforms carrying banners with messages, "Climate change is real" and "We don't have time."