Ключевые слова: alternative, battery, bio, biodiversity, biofuel, biology, bug, bulb, chemical, climate, collection, conservation, earth, eco, ecological, ecology, economy, electric, electricity, energy, environmental, factory, fuel, garbage, globe, growth, healthy lifestyle, horizontal, icon set, illustration, insect, light bulb, no people, outline, panel, planet, planet earth, pollution, power, recycling, renewable, renewable energy, seed, set, solar, star, sunlight, sustainability, technology, wind,