Tropical deforestation is a major problem being faced in both Manaus and all over other tropical rain forests as well. When farmers are in need of more land to plant on, they resort to cutting down trees in the place where you can find the most trees- the rainforest. This is a serious issue in that it destroys the plants, animals, and overall ecosystem of the tropical rainforest. You've seen how beautiful this biome is- why wreck it?