Ключевые слова: achievement, activity, background, block, business, circle, clean, clean energy, company, concept, conservation, construction, cube, development, disease, eco, ecology, economy, energy, environment, environmental technology, factory, global, goal, growth, heart, icon, industry, innovation, market, natural, nature, organization, pollution, protection, recycling, renewable energy, room, sign, solution, space, square, sustainability, symbol, technology, template, tree, up, yellow,