Black smoke billows from a mock gas pipe as young people stage an environmental protest in Milan, Italy. AP Photo
Swedish environmental activist and Fridays for Future founder Greta Thunberg attends a protest in Berlin, Germany. Reuters
Young activists march through Westminster in UK capital London during a global 'climate strike' demonstration, part of the global Fridays for Future movement. AP Photo
Greta Thunberg speaks to demonstrators at a Fridays for Future global climate strike in front of the Chancellery in Berlin. AFP
A young protester take part in a Fridays for Future climate protest in Glasgow, Scotland. Fridays for Future planned 1,400 events in 80 countries. Getty Images
A protester lets off a flare during a Fridays for Future demonstration in Vienna, Austria. EPA
Young people attend a Fridays for Future global climate action day in Prague, Czech Republic. EPA
Former British Labour Party leader Jeremy Corbyn addresses activists at a climate strike demonstration in Parliament Square in London. AP Photo
Fridays for Future protesters, including founder Greta Thunberg, march through Berlin. AFP
Young environmental activists take part in a demonstration in Warsaw, Poland. The banner reads 'Hand in hand'. Reuters
Black smoke billows from a mock gas pipe as young people stage an environmental protest in Milan, Italy. AP Photo
Swedish environmental activist and Fridays for Future founder Greta Thunberg attends a protest in Berlin, Germany. Reuters
Young activists march through Westminster in UK capital London during a global 'climate strike' demonstration, part of the global Fridays for Future movement. AP Photo
Greta Thunberg speaks to demonstrators at a Fridays for Future global climate strike in front of the Chancellery in Berlin. AFP
A young protester take part in a Fridays for Future climate protest in Glasgow, Scotland. Fridays for Future planned 1,400 events in 80 countries. Getty Images
A protester lets off a flare during a Fridays for Future demonstration in Vienna, Austria. EPA
Young people attend a Fridays for Future global climate action day in Prague, Czech Republic. EPA
Former British Labour Party leader Jeremy Corbyn addresses activists at a climate strike demonstration in Parliament Square in London. AP Photo
Fridays for Future protesters, including founder Greta Thunberg, march through Berlin. AFP
Young environmental activists take part in a demonstration in Warsaw, Poland. The banner reads 'Hand in hand'. Reuters
Black smoke billows from a mock gas pipe as young people stage an environmental protest in Milan, Italy. AP Photo
