Nowadays, more than half of the population of the world lives in cities, but this is something new for us, we used to live estrictly connected to the land. But it is going to be worst the next 30 years, the world's urban population is expected to double to more than five billion, with virtually all the growth taking place in less economically developed countries.
We are living in only the 2% of the surface of the earth, but we use three quarters of the planets resources. We have to be conscious of it, we have to do something about it.
"Technology has both facilitated the expansion of cities and enhanced the quality of life for its inhabitants. This has indirectly led to many increasing economic, social and environmental problems. The positive aspects of technology include job creation and easier transport for people".
You can learn more about it in the added presentations.
Presentation about urban sustainability:
Part 1: https://docs.google.com/present/edit?id=0Ad-uTvmOBMZ8ZGhiNnNyNXpfMjhndHZrN3JnOQ&hl=en_US&authkey=CImNjt4P
Part 2: https://docs.google.com/present/edit?id=0Ad-uTvmOBMZ8ZGhiNnNyNXpfMzNkZ2premJocg&hl=en_US&authkey=CJ2C3oMF
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