Ключевые слова: alternative, assessment, biology, carbon, change, circulation, climate, climate change, concern, conservation, development, dioxide, earth, eco, economy, efficiency, environmental, eternity, factory, friendly, fuel, future, global, goal, growth, improvement, infinite, infinity, innovation, loop, management, net, policy, pollution, power, protect, recycle, renewable, resource, responsibility, save, science, solar, strategy, sustainable, system, target, vitality, warming, world,