How do the market economies effect the 'rivers of civilisation' in a negative way?

Question

Please help in this question, and if you can help with writing about how they are a threat to the rivers and how we can avoid this threat....thanks for your help...10 pts best answer...x*x

Answer 1

If by "rivers of civilization" you man the Nile, the Tigris, the Euphrates, the Yellow River, etc., one obvious answer is the building of dams to "improve agricultural productivity" and to generate power:

http://en.wikipedia.org/wiki/Aswan_High_...

http://www.cnn.com/EARTH/9711/04/china.d...

http://www-geology.ucdavis.edu/~cowen/~g...

http://www.american.edu/ted/ice/tigris.h...

http://www.assyriatimes.com/engine/modul...