1 of 13
                        
                            Warsaw
                        
                        
                            Across the globe, students like these two in Poland walked out of class to put their foot down against climate change. From Sydney to Nairobi, young protestors united as international stalwarts of the cause, urging their elected officials to take immediate action.
                        
                        
                            Aleksander Kalka/NurPhoto via Getty Images
                        
                     
                
                    
                        2 of 13
                        
                            Kiev
                        
                        
                            Children flooded the streets of Ukraine, in support of renewable energy sources and an expansion of public electric transport.
                        
                        
                            NurPhoto/NurPhoto via Getty Images
                        
                     
                
                    
                        3 of 13
                        
                            Sydney
                        
                        
                            In Australia, pint-size protestors flocked to a dinosaur bearing a dire warning.
                        
                        
                            Jenny Evans/Getty Images
                        
                     
                
                    
                        4 of 13
                        
                            Nairobi
                        
                        
                            In Kenya’s capital city, young environmental activists shut their textbooks in a “collective call to action.”
                        
                        
                            SIMON MAINA/AFP/Getty Images
                        
                     
                
                    
                        5 of 13
                        
                            Hamburg
                        
                        
                            A boy in Germany, too young to understand the politics and policy intricacies at play, held a simple but poignant message.
                        
                        
                            picture alliance/dpa/picture alliance via Getty I
                        
                     
                
                    
                        6 of 13
                        
                            Berlin
                        
                        
                            Protests were organized in more than 40 German cities today. Activists held signs like this one to impress a sense of urgency with lawmakers, calling on them to “take a fast-track policy route toward lowering CO2 emissions and combating the warming of the Earth's temperatures.”
                        
                        
                            Maja Hitij/Getty Images
                        
                     
                
                    
                        7 of 13
                        
                            London
                        
                        
                            Students in the U.K. crowded the streets as Labour Leader Jeremy Corbyn 
praised the young activists for bringing the discussion of climate change to the “center stage.”
 
                        
                        
                            Dan Kitwood/Getty Images
                        
                     
                
                    
                        8 of 13
                        
                            Washington, D.C.
                        
                        
                            Steps outside the U.S. Capitol, parents accompanied their students who skipped school to experience social activism firsthand.
                        
                        
                            ALASTAIR PIKE/AFP/Getty Images
                        
                     
                
                    
                        9 of 13
                        
                            Edinburgh
                        
                        
                            Students in Scotland aired their grievances, joining a rallying cry of millions of activists participating in today’s Global Climate Strike.
                        
                        
                            JEFF MITCHELL/Getty Images
                        
                     
                
                    
                        10 of 13
                        
                            Manila
                        
                        
                            Students took to the streets of the capital city of the Philippines, demanding action in the name of science.
                        
                        
                            Ezra Acayan/Getty Images
                        
                     
                
                    
                        11 of 13
                        
                            London
                        
                        
                            Demonstrators in England made their voices heard. 
FridaysForFuture, the international movement behind the school strikes, plans another wave of rallies next week.
 
                        
                        
                            Dan Kitwood/Getty Images
                        
                     
                
                    
                        12 of 13
                        
                            Sydney
                        
                        
                            Students rally in Australia, holding the whole world, quite literally, in their hands.
                        
                        
                            Mark Evans/Getty Images
                        
                     
                
                    
                        13 of 13
                        
                            Global Change Agent
                        
                        
                            Widely considered the voice of the movement, 16-year-old climate activist Greta Thunberg is seen here speaking outside the White House on Sept. 13. In 2018, the Swede launched a protest outside Swedish Parliament. Fast-forward one year—and a 
60-foot sailboat expedition and a 
congressional hearing later—and this “
Joan of Arc of climate change” is determined to maintain momentum. Today she participated in the protests in New York City, where 1.1 million students were given permission to skip school to join in.
 
                        
                        
                            Sarah Silbiger/Getty Images