what are environmental benefits and challenges of urbanization?

2 answers

People wouldn't need to drive as much. However, more power stations need to be built to supply all the electricty needed.
Since this is not my area of expertise, I searched Google under the key words "urbanization environment" to get these possible sources:

http://eau.sagepub.com/
http://zebu.uoregon.edu/1999/ph161/l21.html
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http://courses.washington.edu/tande/urb/urb_bib.html
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In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search.

I hope this helps a little more. Thanks for asking.