Ключевые слова: activism, activist, banner, ca, california, change, children, city, civic center, climate march, crowd, demonstrate, demonstration, earth, ecology, emissions, energy, environment, environmental, fossil, fuel, future, global warming, government, green, help, holding, march, market street, message, mother earth, people, placard, politics, pollution, posters, protesters, protesting, rally, san francisco, sign, street, strike, teenager, warming, youth,