Indeed, even if we make the transition to a cleaner world by 2050, we will need to determine how to meet a booming global population’s insatiable appetite for energy in the longer term – an imperative that renewables alone cannot meet. That is why we need to invest now in other technologies that can complement renewables, and provide reliable electricity for many centuries to come.
但减排并不是唯一的挑战。事实上，即使到2050年我们完成向清洁世界的过渡，长远看我们还需要确定如何满足不断膨胀的全球人口对能源永不知足的需求——上述需求仅靠可再生能源势必无法满足。因此我们现在就要投资补充可再生能源及确保未来数百年电力供应的其他技术。其中最具前景的技术是核聚变——核聚变为太阳和星星提供了源源不断的能量。