世界银行：2025年开发住宅建筑节能潜力报告（英文版）

Over the past 20 years, the world has made impressive progress in using energy more efficiently. The rate of improvement in energy efficiency has more than doubled, rising from 0.8 percent per year in the early 2000s to about 1.8 percent per year in the past decade. There is still a long way to go, however: Nearly two-thirds of the energy produced from fossil fuels is wasted rather than put to productive use. As global energy demand is expected to grow by 30 percent in middle- and low-income