MONTREAL, QC - SEPTEMBER 27: Led by Swedish climate activist Greta Thunberg (C), young activists and their supporters rally for action on climate change on September 27, 2019 in Montreal, Canada. Hundreds of thousands of people are expected to take part in what could be the city's largest climate march. (Photo by Minas Panagiotakis/Getty Images)
MONTREAL, QC - SEPTEMBER 27: Led by Swedish climate activist Greta Thunberg (C), young activists and their supporters rally for action on climate change on September 27, 2019 in Montreal, Canada. Hundreds of thousands of people are expected to take part in what could be the city's largest climate march. (Photo by Minas Panagiotakis/Getty Images)
