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Brazilian city's boom threatens Amazon

7 April 2012 Last updated at 09:13 BST

The booming Brazilian economy has brought a new lease of life to the remote city of Manaus, on the banks of the Amazon river.

A new bridge across the world's biggest river and a healthy manufacturing sector are providing plenty of opportunities for the city to grow, but there are warnings about the impact on the environment.

Sarah Grainger reports from Manaus.