Free stock photo of activism, adult, awareness, awareness campaign, black, black hair, buildings, cardboard sign, city, cityscape, cloudy, ecology, environment, environmental conservation, green, hashtag, industrial, male, man, moss, natural, nature, no plastic, outdoors, overcast, peaceful images, peaceful protest, pollution, protest, river, riverbank, shirt, shorts, skyline, sneakers, solitude, standing, sustainability, urban, water