Ключевые слова: 27, activism, activist, banner, board, canada, change, child, children, city, climate, control, crisis, crowd, day, democracy, demonstration, earth, editorial, environment, event, global, group, help, national, ontario, people, political, politics, pollution, poster, protest, protester, protesters, rally, rights, save, school, september, sign, signboard, street, strike, student, toronto, urban, walk, walking, warming, young,