Ключевые слова: abstract, balance, black, blue, bstyle, business, clean energy, cloud, communication, concept, connectivity, digital, ecofriendly, ecology, energy, environment, flat, futuristic, green, growth, harmony, icon, illustration, infrastructure, innovation, integration, internet, metaphor, minimalism, modernity, nature, networking, online, renewable, s1, signal, simple, simplicity, smart city, sustainability, tech, technology, tree, wave, web, wireless,