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More people than ever are living in cities, while only 10 percent of the worlds population did so at the start of the 20th century. The number has grown to 50 percent today. By the end of this century, humans will be a predominantly urban species. As our cities grow, so do the challenges. Space is becoming scarce and social tensions, traffic, noise and pollution are all on the rise. At the same time cities offer many opportunities such as more efficient use of resources, energy and infrastructure. After remaining a relatively small specialty field for decades, sustainable building today hold the technical key for the future.
More people than ever are living in cities, while only 10 percent of the worlds population did so at the start of the 20th century. The number has grown to 50 percent today. By the end of this century, humans will be a predominantly urban species. As our cities grow, so do the challenges. Space is becoming scarce and social tensions, traffic, noise and pollution are all on the rise. At the same time cities offer many opportunities such as more efficient use of resources, energy and infrastructure. After remaining a relatively small specialty field for decades, sustainable building today hold the technical key for the future.