Ключевые слова: air, alternative, background, bio, city, clean, co2, concept, control, design, earth, eco, ecology, ecosystem, electric, electricity, energy, environment, factory, flat, fuel, garbage, graphic, green, icon, illustration, industry, infographic, innovation, landscape, line, nature, organic, pictogram, planet, plants, pollution, power, problem, protection, recycling, renewable, save, technology, template, thin, traffic, water,