Students gather for a protest against climate change in Nicosia, Cyprus, 20 September 2019. Millions of people around the world are taking part in protests demanding action on climate issues. The Global Strike For Climate is being held only days ahead of the scheduled United Nations Climate Change Summit in New York. EPA-EFE/KATIA CHRISTODOULOU

Protesters take part in the Global Strike 4 Climate rally in Sydney, Australia, 20 September 2019. The Global Strike 4 Climate will take place in 110 towns and cities across Australia, with organizers demanding government and business to commit to a target of net zero carbon emissions by 2030. EPA-EFE/STEVEN SAPHORE AUSTRALIA

Bangladeshi school and college students hold a placard during the global climate change strike in Dhaka, Bangladesh, 20 September 2019. According to the Save the Children in Bangladesh and Green Savers Association they supported this strike as children and youth staged a protest in Dhaka to urge global leaders to act against climate change. EPA-EFE/MONIRUL ALAM

Young people gather for a protest against climate change at the Old Town Square in Prague, Czech Republic, 20 September 2019. Millions of people around the world are taking part in protests demanding action on climate issues. The Global Strike For Climate is being held only days ahead of the scheduled United Nations Climate Change Summit in New York. EPA-EFE/MARTIN DIVISEK

Hundreds of youths and students shout slogans and hold placards during a protest against climate change outside Kenya’s Environment Ministry offices in Nairobi, Kenya, 20 September 2019. Millions of people around the world are taking part in protests demanding action on climate issues. The Global Strike For Climate is being held only days ahead of the scheduled United Nations Climate Change Summit in New York. EPA-EFE/DANIEL IRUNGU

Protesters attend a demonstration as a part of the Fridays for Future global climate strike in Central London, Britain, 20 September 2019. Millions of people around the world are taking part in protests demanding action on climate issues. The Global Strike For Climate is being held only days ahead of the scheduled United Nations Climate Change Summit in New York. EPA-EFE/WILL OLIVER

Protesters attend a demonstration as a part of the Fridays for Future global climate strike in Warsaw, Poland, 20 September 2019. Millions of people around the world are taking part in protests demanding action on climate issues. The Global Strike For Climate is being held only days ahead of the scheduled United Nations Climate Change Summit in New York. EPA-EFE/MARCIN OBARA

Ukrainians hold placards during the Global Climate strike in Kiev, Ukraine, 20 September 2019. People around the world are taking part in protests demanding action on climate issues. EPA-EFE/SERGEY DOLZHENKO

Demonstrators gather during a global climate strike demonstration in Istanbul, Turkey, 20 September 2019. Millions of people around the world are taking part in protests demanding action on climate issues. EPA-EFE/ERDEM SAHIN

Protesting school students call for climate change action during a Global Strike 4 Climate rally at Syntagma Square in Athens, Greece, 20 September 2019. The Global Strike 4 Climate is being held only days ahead of the scheduled United Nations Climate Change Summit in New York. EPA-EFE/ORESTIS PANAGIOTOU

People hold placards during the Global Climate Strike at Raadhuspladsen in Copenhagen, Denmark, 20 September 2019. People around the world are taking part in protests demanding action on climate issues. EPA-EFE/NILS MEILVANG DENMARK OUT

Protesters gather during a global climate strike demonstration in Paris, France, 20 September 2019. Millions of people around the world are taking part in protests demanding action on climate issues. EPA-EFE/IAN LANGSDON

Protesters take part in the Global Climate Strike as they march to parliament in Cape Town, South Africa, 20 September 2019. Thousands of children across South Africa joined the global call to action and climate strike protesting in Cape Town calling on government to make radical change in tackling climate change as millions of people around the world are taking part in protests demanding action on climate issues. EPA-EFE/NIC BOTHMA

Protesters take part in a demonstration as a part of the Fridays for Future global climate strike in Brussel, Belgium, 20 September 2019. Millions of people around the world are taking part in protests demanding action on climate issues. The Global Strike For Climate is being held only days ahead of the scheduled United Nations Climate Change Summit in New York. EPA-EFE/STEPHANIE LECOCQ

BERLIN, GERMANY – SEPTEMBER 20: Participants in the Fridays For Future movement protest during a nationwide climate change action day in front of the Brandenburg Gate on September 20, 2019 in Berlin, Germany. Fridays for Future protests and strikes are registered today in over 400 cities across Germany. The activists are demanding that the German government and corporations take a fast-track policy route towards lowering CO2 emissions and combating the warming of the Earth’s temperatures. (Photo by Maja Hitij/Getty Images)

Protesters walk through the center of Maastricht, the Netherlands, during a climate march as a part of the Fridays for Future global climate strike, 20 September 2019. Millions of people around the world are taking part in protests demanding action on climate issues. The Global Strike For Climate is being held only days ahead of the scheduled United Nations Climate Change Summit in New York. EPA-EFE/MARCEL VAN HOORN

Indian students and members of different non-governmental organisation hold posters and wear protective mask, as they take part in a strike day to protest climate change in Bangalore, India, 20 September 2019. Millions of people around the world are taking part in protests demanding action on climate issues. The Global Strike For Climate is being held only days ahead of the scheduled United Nations Climate Change Summit in New York. EPA-EFE/JAGADEESH NV

NEW YORK, NY – SEPTEMBER 20: Thousands of young activists and their supporters rally for action on climate change on September 20, 2019 in New York City. Thousands of young people across the globe are participating in a day of protest calling for urgent action to fight climate change in what organizers are calling the Global Climate Strike. (Photo by Drew Angerer/Getty Images)

People participate in a climate march, organised by Climate Action Now, in Lahore, Pakistan, 20 September 2019. Millions of people around the world from Sydney to Bangkok and Berlin to New York took to the streets calling for urgent action to tackle the climate crisis ahead of a United Nations summit this weekend. EPA-EFE/RAHAT DAR

SANTIAGO, CHILE – SEPTEMBER 19: Demonstrators holds up signs and chant during the global climate strike at Plaza Italia on September 20, 2019 in Santiago, Chile. Strikes are being held all around the world to protest against government and business inaction on climate change. This initiative is led by 16-year-old Swedish climate activist Greta Thunberg ahead of the Climate Action Summit to be held on September 23. (Photo by Marcelo Hernandez/Getty Images)

SANTIAGO, CHILE – SEPTEMBER 19: Demonstrators perform during the global climate strike at Plaza Italia on September 20, 2019 in Santiago, Chile. Strikes are being held all around the world to protest against government and business inaction on climate change. This initiative is led by 16-year-old Swedish climate activist Greta Thunberg ahead of the Climate Action Summit to be held on September 23. (Photo by Marcelo Hernandez/Getty Images)

Following the call of Fridays For Future Hungary and Extinction Rebellion Hungary young environmentalists stage a protest in Budapest, Hungary, 20 September 2019. Millions of people around the world are taking part in protests demanding action on climate issues. The Global Strike For Climate is being held only days ahead of the scheduled United Nations Climate Change Summit in New York. EPA-EFE/ZOLTAN BALOGH