Ключевые слова: alternative, alternative energy, black and white, chemical, chemistry, clean, doodle, drop, eco, eco friendly, ecology, effective, efficiency, electricity, element, energy, environment, environmental, friendly, fuel, future, gas, generation, h2, hand drawn, hydrogen, illustration, industrial, industry, innovation, isolated, molecule, nuclear, power, quantum, recycling, renewable, renewable energy, research, resource, safety, science, source, station, sustainable, symbol, tank, technology,