it s tine for current leaders to stop the environmental legacy they re leaving behind. i m trying to use my voice. actually this is something i really need to be thinking about, something i really need to be acting on. reporter: it was a similar theme from protesters in the french capital and also in germany where activists shut down roads. a lot of people support our movement but we want to go a step further because politicians decide on our future. we ur gently demand something happens. reporter: a year ago in sweden greta thunberg began a school strike for climate. today on those same streets, students gathered in the thousands, while she travels the world advocating for change, a
listen. there were some pretty sizeable crowds of students walking out of their schools to demand changes with climate change across the country. not just the country, but around the world. there were huge turnouts in new york, berlin. they say it s the biggest they ve had so far. what most of these students want is a reduction in greenhouse gas emissions. the 16-year-old climate activist greta thunberg organized the day of demonstrations. our nina dos santos is taking look at the rallies around the globe for us. reporter: in australia they gathered in hundreds of thousands, determining to make their voice heard. it seems that the only people standing on the wrong side of
students accompanied by parents who made their own homemade signs. the message is the same the world over. it s time world lead ers took stock of the environmental legacy they re leaving behind. i can t vote. i don t have that political power yet, so i m exercising my voice the only way i can. trying to make people think. actually this is something i need to be thinking about and aka acting on. reporter: also in germany where activists shot down roads. translator: a lot of people support our movement, but we want to go a step further because politicians decide on our future. we urgently demand that something happens. reporter: a year ago in sweden greta thunberg began a weekly school strike for climate. today on those same streets students gathered in the thousands.