Deforestation of the Amazon rainforest The completion of the roads was followed by a wave of resettlement; these settlers had a significant effect on the forest as well. Research conducted by Leydimere Oliveira et al. has shown that the more rainforest is logged in the Amazon, the less precipitation reaches the area and so the lower the yield per hectare becomes. Thus for Brazil as a whole, there is no economic gain to be made by logging and selling trees and using the logged land for pastoral purposes. A September 2016 Amazon Watch report concludes that imports of crude oil by the US are driving
Amazon River the world's largest, draining the most extensive area of rainforest on the planet. Paralleling the Amazon River is a large aquifer, dubbed the Hamza River, the discovery of which was made public in August 2011. More than one-third of all known species in the world live in the Amazon rainforest, a giant tropical forest and river basin with an area that stretches more than . It is the richest tropical forest in the world in terms of biodiversity. There are over 3,000 species of fish currently recognised in the Amazon basin, with more being discovered every year. In addition to