In the last century, the world got richer; its population quadrupled; the number of people living in cities grew thirteen-fold; and we consumed more of everything. Water consumption rose nine-fold and energy use thirteen-fold.
在上个世纪，这个世界的腰包鼓了起来；人口增加了4倍；城市人口也增加了13倍；而我们对所有物质的消费都有增无减。我们多用了9倍的水资源和13倍的能源。工业生产也比世纪初跃升了40倍。