Population growth in the Brazilian jungle is visible in places like Parauapebas. On the outskirts, slums stretch to the horizon and houses continue to go up. &lt;a href=&quot;http://www.nytimes.com/2012/11/25/world/americas/swallowing-rain-forest-brazilian-cities-surge-in-amazon.html&quot;&gt;Go to related article »&lt;/a&gt;