VIENNA, AUSTRIA - OCTOBER 07: Police officers stand guard as environmental and climate change activists from Extinction Rebellion stage a protest to draw attention to climate change and global warming in Vienna, Austria on October 07, 2019. Askin Kiyagan / Anadolu Agency/ABACAPRESS.COM

VIENNA, AUSTRIA - OCTOBER 07: Environmental and climate change activists from Extinction Rebellion stage a protest to draw attention to climate change and global warming in Vienna, Austria on October 07, 2019. Askin Kiyagan / Anadolu Agency/ABACAPRESS.COM

VIENNA, AUSTRIA - OCTOBER 07: Police officers intervene in protesters during a protest to draw attention to climate change and global warming in Vienna, Austria on October 07, 2019. Askin Kiyagan / Anadolu Agency/ABACAPRESS.COM

VIENNA, AUSTRIA - OCTOBER 07: Police officers intervene in protesters during a protest to draw attention to climate change and global warming in Vienna, Austria on October 07, 2019. Askin Kiyagan / Anadolu Agency/ABACAPRESS.COM

VIENNA, AUSTRIA - OCTOBER 07: Police officers intervene in protesters during a protest to draw attention to climate change and global warming in Vienna, Austria on October 07, 2019. Askin Kiyagan / Anadolu Agency/ABACAPRESS.COM

VIENNA, AUSTRIA - OCTOBER 07: Environmental and climate change activists from Extinction Rebellion stage a protest to draw attention to climate change and global warming in Vienna, Austria on October 07, 2019. Askin Kiyagan / Anadolu Agency/ABACAPRESS.COM

VIENNA, AUSTRIA - OCTOBER 07: Environmental and climate change activists from Extinction Rebellion stage a protest to draw attention to climate change and global warming in Vienna, Austria on October 07, 2019. Askin Kiyagan / Anadolu Agency/ABACAPRESS.COM

VIENNA, AUSTRIA - OCTOBER 07: Environmental and climate change activists from Extinction Rebellion stage a protest to draw attention to climate change and global warming in Vienna, Austria on October 07, 2019. Askin Kiyagan / Anadolu Agency/ABACAPRESS.COM

VIENNA, AUSTRIA - OCTOBER 07: Environmental and climate change activists from Extinction Rebellion stage a protest to draw attention to climate change and global warming in Vienna, Austria on October 07, 2019. Askin Kiyagan / Anadolu Agency/ABACAPRESS.COM

VIENNA, AUSTRIA - OCTOBER 07: Police officers take a protester into custody as environmental and climate change activists from Extinction Rebellion stage a protest to draw attention to climate change and global warming in Vienna, Austria on October 07, 2019. Askin Kiyagan / Anadolu Agency/ABACAPRESS.COM

VIENNA, AUSTRIA - OCTOBER 07: Environmental and climate change activists from Extinction Rebellion stage a protest to draw attention to climate change and global warming in Vienna, Austria on October 07, 2019. Askin Kiyagan / Anadolu Agency/ABACAPRESS.COM

VIENNA, AUSTRIA - OCTOBER 07: Environmental and climate change activists from Extinction Rebellion stage a protest to draw attention to climate change and global warming in Vienna, Austria on October 07, 2019. Askin Kiyagan / Anadolu Agency/ABACAPRESS.COM

VIENNA, AUSTRIA - OCTOBER 07: Environmental and climate change activists from Extinction Rebellion stage a protest to draw attention to climate change and global warming in Vienna, Austria on October 07, 2019. Askin Kiyagan / Anadolu Agency/ABACAPRESS.COM

VIENNA, AUSTRIA - OCTOBER 07: Environmental and climate change activists from Extinction Rebellion stage a protest to draw attention to climate change and global warming in Vienna, Austria on October 07, 2019. Askin Kiyagan / Anadolu Agency/ABACAPRESS.COM