Ключевые слова: arrow, atmosphere, bio, cloud, co2, concept, conservation, contour, cycle, dioxide, eco, ecological, ecology, electric, emission, energy, environment, environmental, exhaust, gas, globe, glowing, green, icon, illustration, isolated, leaf, light, line, linear, natural, nature, neon, outline, planet, plant, power, recycling, renewable, reuse, save, saving, science, set, sign, symbol, waste,