Technology review on how some cities are using Mobile apps, sensors, and other technologies to handle growing challenges.
Fifty-four percent of humanity lives in urban centers, and almost all of the world’s projected population growth over the next three decades will take place in cities, including many very poor cities. Because of their density and often strained infrastructure, cities have an outsize impact on the environment, consuming two-thirds of the globe’s energy and contributing a large share of its greenhouse-gas emissions. Urban water systems are leaky. Pollution levels are often extreme.Technology Review
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