epa09485713 Swedish climate activist Greta Thunberg delivers a speech at the Fridays For Future global climate action day in Berlin, Germany, 24 September 2021. Climate activists of Fridays For Future call for socially fair and consistent measures to limit climate heating to 1.5 degrees Celsius ahead of German federal elections, that take place on 26 September 2021. The young activists are planning hundreds of protests and demonstrations worldwide during a 'climate strike' on 24 September 2021. EPA-EFE/CLEMENS BILAN

epa09485631 A poster being put up on the police barricade by the climate activists and students during a protest against climate change in New Delhi, India, 24 September 2021. Indian activists held a rally up to Delhi assembly as part of the Fridays for Future global climate strike movement. EPA-EFE/HARISH TYAGI

epa09485335 Protesters holding placards during Fridays for Future demonstration for the global climate strike in Rome, Italy, 24 September 2021. EPA-EFE/ANGELO CARCONI

epa09485670 Participants display banners during a Youth Climate Strike in Warsaw, Poland, 24 September 2021. Dozens of youth activists participated in a rally as part of the Fridays for Future global climate strike movement demanding governments to declare a climate emergency. EPA-EFE/RADEK PIETRUSZKA POLAND OUT

epaselect epa09485194 Protesters with signs and slogans during the Fridays for Future demonstration for the global climate strike in Rome, Italy, 24 September 2021. EPA-EFE/ANGELO CARCONI