Greens wish Mr Obama would use his immense popularity and rhetorical skills to persuade Americans that such costs are outweighed by the benefits of helping to avert planetary catastrophe.

• 环保人士希望奥巴马先生能利用他的广泛的民众支持率和高超的演说技巧来游说美国人，让民众觉得扼制星球灾难而获得的好处远比这样的开支来得重要。