But, as important as high-level deals are, they will amount to little unless they are backed by considerable investment in areas like smart grids, energy storage, and renewables. Indeed, the International Energy Agency estimates that nearly $1 trillion worth of investment will be needed annually between now and 2050 to put the world economy on a more sustainable path.
高层协议虽然重要，但若不能实现对智能电网、能源储存和可再生能源等领域大额投资，这些协议将收效甚微。事实上，国际能源署估计，从现在到2050年，每年需要投入1万亿美元才能让世界经济走上可持续道路。