Ключевые слова: activism, activist, campaign, change, climate, climate summit, concept, crowd, crowded, demonstration, earth, ecology, education, environment, environmental, fight, finland, friday, fridays, fridays for future, future, global, global climate change, global warming, green, greta, helsinki, helsinki city, ilmastolakko, march, planet, politics, pollution, poster, protest, protesters, rights, save the earth, school, school children, school strike, sign, street, strike, strikes, thunberg, warming, world, young, youth strike,